Pulse/QCW Diode Driver

STOP Series Pulse Diode Drivers, Optical Pulse Generators & Seeders

We have unique capabilities in optical pulse generators, seeders and drivers.

Our STOP-LDa series includes pulser products with pulse-width range from pico-seconds to micro-seconds and with peak power of over 1W.

Our ANYPULSE technology (patent pending) offers programmable time-domain waveform generation with optical transmission. Our control software allows the user to program his own waveform in nano-second resolution and 11 bit amplitude resolution.

Our high-speed and high power linear laser drivers convert analog signals to optical transmission with peak laser current up to 3A. Our high-speed and high power digital laser drivers convert digital signals to optical transmission with peak laser current up to 0.5A, data rate up to 1Gb/s and handling of PRBS data patterns.

We integrate in our products the laser diode or LED that you need: cooled or uncooled, wavelength range from UV to IR, including 1064 and 1550nm. An evaluation board and accessories are offered for quick evaluation of our modules.

Product Applications

• Seeders for pulsed fiber-lasers

• Laser source for 3D cameras (Time-of-Flight)

• Pulsers for Laser-Range-Finders and LIDARs

• Transmitters for telecomm applications

• Time Domain Fluorescence Microscopy

Product List

1. STOP-LDa pulser series:

The STOP-LDa pulsers include a laser pulser, TEC controller and laser diode. Peak power up to over 1W. Duty cycle limit ~ 10%. High speed or high current versions.

• STOP-LDa-gs: fixed pulse-width of 50ps to 150ps – gain switching.

• STOP-LDa-3: pulse-width of 0.5 to 3ns with continuous pulse-width tuning.

• STOP-LDa-64: pulse-width of 1 to 64ns in 0.25ns steps and fine tuning.

• STOP-LDa-128: pulse-width of 1 to 128ns in 0.5ns steps and fine tuning.

• STOP-LDa-256: pulse-width of 1 to 256ns in 1ns steps and fine tuning.

• STOP-LDa-1250: pulse-width of 10 to 1250ns in 5ns steps and fine tuning.

• STOP-LD-H1: Peak pulse current: up to 25A / 50A, pulse-width options in range of 10ns to 1us in 5ns steps, frequency up to 10MHz.

2. Pulse Shaping (time domain) products:

• STOP-AWG2500: Arbitrary Waveform Generator with time resolution of 555ps. Other resolution - per request.

• STOP-LD-Lin-HC: Linear optical transmitter, peak current up to 2A (~3A nonlinear), rise/fall time ~1.5ns.

• STOP-LD-Lin-HS: Linear optical transmitter, peak current up to 0.5A, rise/fall time ~0.6ns.

• STOP-LD-ps: This product is a combination of the AWG2500 and the STOP-LD-Lin. It acts as an optical arbitrary waveform generator. Programmable in time resolution of 555ps.

• STOP-SW-ps1: PC software with a friendly GUI for the STOP-LD-ps and for the STOP-AWG2500. Allows programming of any waveform and comprehensive control.

• STOP-AMP-700: Pulse amplifier to drive MZ modulators. Complements the STOP-AWG2500 in applications where a MZ modulator is required. Peak voltage up to 5V. Tr/Tf ~ 1ns.

3. Laser driver for 3D ToF cameras

• STOP-LD-D1: Digital transmitter, peak current up to 500mA, data rate up to 1Gb/s. Tr/Tf ~ 350ps. CML or ECL data input. Supports PRBS patterns. The product also suits special telecom applications.

4. Evaluation board (Test Jig) and accessories:

• Test jig for standard products: Suits all STOP-LD products. Provides power control and trigger.

• STOP-EXT40-2: 40 wire, 50cm long cable for connecting to all STOP-LD products in OEM applications.

• SMA to MCX (male) RF cable: For monitoring the laser current in all STOP-LD products.

• SMA to MCX (female) RF cable: For direct connection to AWG2500 RF outputs.

Product options:

• High speed versions or high current versions.

• Built in potentiometers or external controls.

• Laser diodes types: BTF or coax packages, various wavelength.

• OEM modules or benchtop instruments.

Details of Products

1. STOP-LDa Pulsers Series

• All seeder's functions integrated in one assembly: Adjustable pulse generator; Pulse driver; Efficient TEC controller; Laser diode

• Pulse-width coverage of picoseconds (gain-switching) to micro-seconds

• Peak current up to 3A

• Pulse width, bias, temperature and amplitde (optional) adjustments

• External or on-board controls

• Wide selection of laser diodes or LEDs

• Monitoring for all key parameters

1.1 STOP-LDa-gs Seed Laser / Picoseconds optical Pulser / Driver

• Fixed pulse width of 50ps to 150ps

The STOP-LDa-gs seed laser assembly is an integrated solution for the seed (oscillator) part of pulsed MOPA fiber laser systems. The assembly includes all the key functions needed in a high-performance seeder, including a trigger generator, an adjustable pulse-width generator, laser driver, TEC controller and an integrated laser diode.

The optical peak power can be adjusted by an on-board potentiometer. The trigger source is selectable: internal or external. In external trigger mode each incoming trigger signal (rising edge) results in a generation of a single pulse.

The optical pulse-width is controlled by an external analog control voltage. The pulse-width range is from gain-switching mode (~50ps) to over 1ns. The module has also analog control inputs for bias current and set temperature. Each of the input analog control signals can be replaced by an on-board potentiometer so that the module can either be controlled externally or have internal settings. With the bias current-control the user can impact the optical spectral width or to change the extinction ratio.

The product is designed to operate in a wide temperature range and in maintenance-free conditions – making it a good choice for OEM integration in industrial laser systems. Various product options are being offered.

Features

• All seeder's functions integrated in one assembly: Adjustable pulse generator from gain-switched operation (~50ps) to 1ns; On-board trigger generator: 4K-20MHz; Efficient TEC controller; Laser diode; Designed for OEM in laser systems

• Compact: 62mm x 45mm

• Typical optical peak power of 0.5W

• Pulse amplitude control

• Tunable bias-current up to 50mA (or 200mA)

• On board potentiometers or external controls

• Efficient protection on the laser diode

• Wide selection of laser diodes in wavelengths of 1064nm, 1550nm and more

• Monitoring of all key parameters

• Quick evaluation by STO’s test jig or CSW-3 controller board or a cable assembly EXT-40-2

Product Applications

• Seed Laser for fiber lasers

• Optical pulser for high-resolution LIDAR

• Characterization of high-speed optical receivers

Suitable Laser Diodes

Various laser diodes are available to be used with the STOP-LDa-gs: DFB, FP or FBG types; wavelengths of 1030nm, 1064nm, 1310nm, 1480nm, 1550nm or other custom wavelengths. Butterfly package (14 pins or 10 pins) or Coaxial package.

Ordering Information

• * For bias current of 200mA a heat sink is required and the module length grows to 80mm.

• For a comprehensive description of module's pin-out and controls please contact us.

1.2 STOP-LDa-3 Seed Laser / Optical Pulser Assembly

- Pulse width of 0.5ns to 3ns with continues pulsewidth tuning

The STOP-LDa-3 seed laser assembly is an integrated solution for the seed (oscillator) part of pulsed MOPA fiber lasers systems. The assembly includes all the key functions needed in a high performance seeder, including an adjustable pulse-width generator, laser driver, TEC controller and an integrated laser diode.

Each incoming trigger signal (rising edge) results in a generation of a single pulse. The pulse-width is adjustable in the range from 0.5ns to over 3ns. An on-board trigger generator is an optional feature. The module has analog control inputs: Pulse-width, bias current and set temperature (also optional amplitude control). Each of the input analog control signals can be replaced by an on-board potentiometer so that the module can either be controlled externally or have internal settings. With the bias current control the user can impact the optical spectral width or to change the extinction ratio.

The product is designed to operate in a wide temperature range and in maintenance-free conditions – making it a good choice for integration in commercial and industrial laser systems.

Features

• All seeder's functions integrated in one assembly: Adjustable pulse generator from 0.5ns to 3ns;  Pulse driver; Efficient TEC controller; Laser diode.

• Designed for OEM in laser systems

• Compact: 62mm x 45mm

• Peak laser current of 2A / Optical peak power up to 1W

• Bias current control to control optical spectrum

• Efficient protection on the laser diode

• On board potentiometers or external controls

• Wide selection of laser diodes in wavelength of 1064nm, 1550nm and more

• Monitoring of all key parameters

• An evaluation board is available for quick evaluation

• Cable assembly is available for connecting to customer's system

Product Applications

• Seed laser forfFiber lasers

• Optical pulser for LRF or LIDAR target simulators

• Time domain fluorescence microscopy

• 3D Vision systems

• Characterization of high speed optical receivers

Suitable Laser Diodes

Various laser diodes are available to be used with the STOP-LDa-3: DFB, FP or FBG types; wavelengths of 1030nm, 1064nm, 1310nm, 1480nm, 1550nm or other custom wavelengths. Butterfly package (industrial type) or Coaxial package

1.3 STOP-LDa-64-Ins-DFB Seed Laser / Optical Pulser Instrument

The STOP-LDa-64-Ins-DFB is a flexible seeder instrument that can be used in pulsed MOPA fiber lasers systems. The instrument includes all the key functions needed in a high performance seeder, including an adjustable trigger generator, a pulse-width generator, laser driver, TEC controller and an integrated laser diode.

The instrument can be triggered by incoming trigger signal (rising edge) too. The pulse-width is adjustable in 8 bit resolution and an addition of fine tuning. Bias current of the laser can be tuned by the user to impact the optical spectral width.

The laser diode's temperature can be controlled by the user for fine wavelength control. The back side of the instrument includes interlock connector for safety and a USB connector for control by user's PC

(A windows operating system is required).

Features

• A powerful and flexible nano-second seeder in a benchtop enclosure: Adjustable pulse-width generator and trigger generator; Pulse driver; TEC controller for fine wavelength tuning; Laser diode

• Adjustable pulse-width 1ns to 64ns (Note 1)

• Adjustable repetition rate from 2.5KHz to 25MHz and external trigger up to 40MHz

• Includes a 1064nm DFB laser diode (Note 2)

• Peak laser current of 2A / Optical peak power up to 800mW (Note 3)

• Bias current control for superior spectral control

• Graphical User Interface to control all instrument's functions

• Optical output provided through an FC/APC connector

• RF output to monitor laser's current

Product Applications

• Seed laser for fiber lasers

• Optical pulser for LRF or LIDAR target simulators

• 3D Vision systems

Ordering Information

For the instrument with a 1064nm DFB laser diode the order number is -STOP-LDa-64-Ins-DFB-1064

• Notes: (1) Other pulse-width ranges are available too. Please contact us for details.

• (2) Other laser diodes in various wavelengths are available too. Please contact us for details.

• (3) Peak power up to 1.5W – using selected laser diodes.

1.4 STOP-LDa-YYY–HS Seed Laser / Optical Pulser Assembly

The STOP-LDa-yyy-HS series seed modules are integrated solutions for the seed (oscillator) part of pulsed MOPA fiber lasers systems. The modules include all the key functions needed in a high-performance seeder, including an adjustable pulse-width generator, laser driver, TEC controller and an integrated laser diode. Each incoming trigger signal (rising edge) results in a generation of a single pulse. The pulse-width is adjustable in 8 bit resolution and an addition of fine tuning. The four products in this series cover total pulse width range from 1ns to 256ns. The module also has analog control inputs: Fine pulse-width, bias current and set temperature. Each of the input analog control signals can be replaced by an on-board potentiometer so that the module can either be controlled externally or have internal settings.

The product is designed to operate in a wide temperature range and in maintenance-free conditions – making it a good choice for integration in commercial and industrial laser systems.

Features

• All seeder's functions integrated in one assembly: Adjustable pulse generator 1ns to 256ns in 3 product versions; Pulse driver; Efficient TEC controller; Laser diode.

• Designed for OEM in laser systems

• Compact: 63mm x 50mm

• HS version: Optical rise and fall times below 1ns (Tested at 20%-80% levels)

• Peak laser current of 800mA

• Bias current control

• Efficient protection on the laser diode

• On board (pots) or external controls

• Wide selection of laser diodes

• Monitoring of all key parameters

• A controller board with GUI software is available to enable PC control.

Product Applications

• Seed Laser for Fiber Lasers

• Optical pulser for LRF or LIDAR target simulators

• 3D Vision systems

Suitable Laser Diodes

Various laser diodes are available to be used with the STOP-LDa-yyy: DFB, FP or FBG types; wavelengths of 1030nm, 1064nm, 1310nm, 1480nm, 1550nm or other custom wavelengths. Butterfly package (industrial type) or Coaxial package

2. Transmitter modules for LIDAR: STOP-LDb-5/10

The STOP-LDb series modules were designed for systems requiring a short optical pulse source with high peak power. The modules operate in frequencies of DC up to 5MHz. The peak current is up to 25A and the optical peak power (at 905nm) is up to 75W – depending on the selected laser diode. In order to protect the laser diode, the average optical power is limited to 0.1W. The modules operate on a single 12V power supply and a trigger input signal in LVTTL or TTL levels (rising edge).

Optical pulse-width is programmable in two ranges:

• Part number STOP-LDb-5: Range of sub-nanosecond to 5ns.

• Part number STOP-LDb-10: Range of 3ns to 10ns.

The peak power is programable too.

Pulse-width and peak power programming is done either by on-board potentiometers or by external analog voltage controls. A monitor signal indicates the average laser current. The module was designed to be integrated in real-life systems that operate for years.

Features

• Optical transmitter for LIDAR applications

• A compact and robust OEM module for variety of applications, including automotive

• Peak current up to 25A and peak power up to 75W

• Programmable pulse-width setting from 1ns to 10ns

• Operating frequency from DC to over 5MHz*

• Operates on a single 12V power supply

• A built-in step up power supply

• LVTTL / TTL trigger input

• Selection of laser diodes in TO can, SMD package or LD chip.

• Selection of wavelengths: 905nm, 1550nm or custom.

• Enhanced thermal design to maximize performance

• Four mounting holes to fit the module in your system and attach optics

• (*) With reduced peak power

Product applications

• LIDAR for Automotive

• 3D terrain mapping

• Augmented reality

• Gesture recognition

• High resolution LRF

3. STOP-LD-ps Seed Laser Assembly with pulse shaping

The STOP-LD-ps series seed laser assembly is an integrated solution for the seed (oscillator) part of pulsed MOPA fiber lasers systems. The assembly includes all the key functions needed in a high performance seeder, including an arbitrary waveform generator, laser driver, TEC controller and an integrated laser diode.

The product is designed to operate in a wide temperature range and in maintenance-free conditions – making it a good choice for integration in laser systems for industrial, bio/medical and military applications.

Features

• Multiple functions integrated in one unit: Arbitrary waveform generator; High bandwidth linear current driver; Efficient TEC controller; Laser diode

• Our AnypulseTM technology

• Flexible pulse shaping with 1ns resolution

• Laser current up to 2A with 11 bit resolution

• Triggering modes: Internal, external, loops

• Serial interface to PC or to customer's system

• PC control and intuitive GUI control

• Available wavelength: 1550nm, 1064nm or custom

• OEM circuit board (12cm x 7cm) or lab instrument

Benefits of pulse shaping

• Comprehensive waveform control to enhance performance of pulsed fiber laser systems

• Increases energy conversion efficiency in wavelength converters.

• Adds flexibility to laser systems to perform a wide range of material processing tasks.

Product applications

• Seed laser for Fiber Lasers

• Simulator for laser-range-finders and LIDAR systems

• Waveform or pulse generator for high speed electronic systems

4. Controller and GUI for STOP-LD series modules

Our Controller/GUI is compatible to all STOP-LD series modules. The product shall be used in conjunction with any of the STOP-LD modules. The product's main features are:

• RS-232 connectivity and USB connectivity using a RS232-USB cable.

• A single Power supply (12V or 24V). The controller provides the supply voltages to the STOP-LD module.

• On board trigger generator 2.5KHz to 25MHz and supporting external trigger from DC to up to 50MHz.

The STOP-LD module with the Controller/GUI form a capable and easy to use solution with no need to deal with manual calibrations and analog control signals.

Features

• The Controller/GUI matches all our STOP-LD modules (pulsers and laser drivers)

• RS-232 interface (USB using a serial-USB cable)

• Eliminates the need for discrete control inputs

• GUI software to controls all module's functions

• Single Power supply (12V or 24V)

• A wide range trigger oscillator and diverse triggering features.

• Save / retrieve waveform function

• Safety features: Interlock/Key input and quick shut-down from the GUI

• Compact: 70mm x 60mm

Product Applications

• Seed laser for fiber lasers

• Optical pulser for LRF or LIDAR target simulators

• 3D Vision systems

• Pico-second to nanosecond pulsers for lab use

The GUI software controls all the functions of the STOP-LD module and displays status/monitoring data. It includes tens of pre-set values of pulse-width, frequencies, bias currents, Peak currents and LD temperatures. The GUI also allows the user to save and retrieve waveforms. A special attention was made to safety features: Interlock input, Key input and a one touch quick shut-down from the GUI.

Attaching the controller to an STOP-LD board forms one board with total dimensions of ~7X10 cm. The user may also connect the two boards by using a cable. The two boards can also be attached to form a (sandwich) having dimensions of 70mm x 60mm.

Ordering codes:

• STOP-CSW-64 Controller/SW for STOP-LDa-64

• STOP-CSW-256 Controller/SW for STOP-LDa-256

• STOP-CSW-1250 Controller/SW for STOP-LDa-1250

• STOP-CSW-3 Controller/SW for STOP-LDa-3 and STOP-LDa-gs

STJ Series QCW Laser Diode Drivers

The QCW Laser diode driver is specially designed for various QCW laser diodes at the compact size and modularization. It adopts the latest modern power electronic devices, high-speed microprocessor (MPU) program control technology, and low-power linear modulation technology (with extremely low ripple). It has excellent voltage and current output characteristics. No overshoot, no kickback, no surge and low noise when operation. It has perfect multiple protection functions, and has reliable protection for laser diode. The adjustment and control of current parameters can be selected by local and computer (setting by software). In addition, the driver also has alarm signal settings. (eg. water pressure alarm, for shutdown protection). The driver adopts 240x128 dot matrix graphic LCD or 16 bit "8" digital tube display, simple menu mode display, membrane button, and has friendly user interface and fault diagnosis function. And TEC for precision maintaining the temperature on peiltier element (TEM) is also an optional.

The QCW laser diode driver is an excellent choice for laser equipment manufactures and research institute. It can set the temperature parameters independently and you can also set the temperature on the LCD only via a serial line to connect to the laser driver.

Features:

• Ideal rectangle output pulse current waveform;

• The max output voltage 50V (adaptive load)

• Adaptive load, real-time display of actual voltage;

• 0-150A (The output current is continuously adjustable), QCW output;

• Pulse frequency 1-2000Hz (adjustable). The Max 5kHz (When the duty cycle =50%, need to customized);

• Pulse width 20-500us (adjustable) (Need to customized if the pulse width >1000us);

• Pulse duty cycle 0-25% (max) adjustable.( Need to customized if the duty cycle >25%);

• Local & computer control for the pulse current;

• Local & computer control for the pulse frequency;

• Local & computer control for the pulse width;

• Local and computer control for power on / off;

• A 400million times counting ability pulse counter PC, which is used to count the output pulse (only for Y1 and Y2 models);

• High speed ,rapidly adjusted the current value of each pulse one by one;

• Delay synchronization signal output with 0-6000us delay and adjustment step size at 1us;

• With input alarm signal (eg. water pressure alarm, for shutdown protection);

• Over heat, over current protections;

• High stability, high anti-interference and low noise;

• 240x28 dot matrix graphic LCD or 16 bit "8" digital tube display, to show setting current, actual current, voltage and power, simple menu / mode display, membrane button

• User friendly interface, fault diagnosis function

• With perfect PID control software, intelligent step-less temperature control on both heating and cooling, TEC laser diode driver is an good optional for better laser performance and compact size for the user.

• We can customize the driver according to customer’s requirements.

Remarks:

• If you need 110VAC input power supply, please inform us when ordering

• We have four sizes of the drivers W×L×H＝304×295×88mm (Y1, S1);W×L×H＝425×310×88mm (Y2, S2);

• Above drivers are our standard models. We can also customize according to customer’s parameters.

• We can customized the driver with adjustable pre-current (It is also known as preheating current, maintaining current, base current).

STO Series Pulse Diode Drivers

1. STO-PDD Series Pulse Diode Drivers

STO-PDD series diode drivers are probably the most powerful diode drivers in the aesthetic world. Peak output power is up to 10kW (with user selectable IMAX and VMAX). Averaged output power is up to 1600W (assuming 100-240VAC input) and over 2000W on request (with 200-240VAC input).

Since the driver was especially designed for laser hair removal applications, it's fully compliant to the medical standards - IEC 60601-1 for electrical safety and IEC 60601-1-2 for electromagnetic compatibility. Besides, they are also widely used in diode pumping and direct diode laser applications.

2. STO-PDD-3U Pulsed Diode Driver

STO-PDD-3U is a pulsed diode driver especially designed for diode pumping of Nd:YAG and similar solid-state lasers. It is quite a high power solution. Maximal output power is up to 500W. Maximal output current (IMAX) and maximal compliance voltage (VMAX) achieve 400A and 400V respectively although not at the same time (with peak power limited with 20kW). A number of models with different IMAX and VMAX is available.

APPLICATIONS

• Pumping of pulsed DPSS lasers (Nd:YAG, diodes and similar)

FEATURES

• 100-240VAC input

• Output current up to 400A

• Output voltage up to 400V

• Output power up to 20kW (peak)

• Output power up to 500W (average)

• Fast rise and fall times

• Multiple outputs and other options

INTERFACES

User interface is 7-inch full color display on front panel. Base machine interface is RS-485. The following user and machine interfaces are available as alternatives:

• RS-232 machine interface

• Remote control (see picture below)

• No front panel UI (low cost modification for embedded applications)

WATER COOLING (OPTION)

STO-PDD-3U can be supplied in two modifications different with cooling method. The default option is a forced air cooling with embedded fans. Since, due to high heat dissipation at maximal output power, the noise produced by fans might seem to be undesirable high, we offer an alternative of water cooling.

Most of the parameters can be tailored to the customer’s requirements. Feel free to contact us if your needs are different from the specifications above.