Ultrafast Laser Instrumentation

  • Update:Jan 28, 2021
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Our current product-line includes a single shot autocorrelator, capable of measuring few cycle pulses with interferometric resolution, and an innovative SHG single shot FROG. Both are suitable for several wavelength ranges (from UV to mid-IR) and seve

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1. Advanced Ultrashort Laser Pulse Characterization Device

STF series advanced ultrashort laser pulse characterization device is a real-time ultrashort laser pulse characterization device specifically engineered to provide a high-resolution measurement for ultrafast oscillators and amplifiers. It is an essential piece of equipment for everyone who depends on accurate information about properties of their ultra-short pulses. With the device you get more than just a single result. You can watch your pulse evolving in real time.

Part number

STF

Fourier transform-limited pulse duration

60 - 400 fs

Input central wavelength

1010 - 1070 nm (other on request)

Maximum chirped pulse duration

4 ps

Maximum dispersion

<80000 fs2

Repetition rate

1 kHz — 200 MHz

Sensitivity

>0.5nJ at 80MHz; >100nJ at 1kHz

Input polarization

Linear, vertical

Integrated high-resolution spectrometer (USB 2.0)

Included

User-friendly software and manual

Included

Automated tuning

Optional

Electrical: Manual version

                 Automated version

USB powered (5V, 500mA)

100-240VAC, 50/60Hz, <70W

Operating temperature

15-25oC

Operating humidity

Non-condensing

Size (including spectrometer) (LxWxH)

430x200x55mm

2. STFE Series Ultrafast Instrumentation (No Alignment!)

We are a company specialized in ultrafast metrology. We have a strong expertise in the production and characterization of high energy ultrashort pulses and we provide robust and reliable measurement devices for ultrafast lasers, already in use in several state of the art laboratories.

Our current product-line includes all the useful instruments to characterize and manage ultrafast lasers. We provide innovative devices for temporal measurement (ROC and FROG), spectral measurement (MISS spectrometer) and spatial measurement (BeamPro). They are suitable for a broad wavelength range (from UV to mid-IR) and a large pulse duration range, from 5 fs to 80 ps. Our latest addition to our range of products is an innovative, ultra compact, frequency converter for harmonic generation directly coupled to your ultrafast laser.

Beside their intrinsic technical performances, our products are very easy to use, compact, portable and versatile, which make them the ideal tools for customer services. The products are associated with a high quality user-friendly software which contributes to making them easy and pleasant to use. We also make custom products upon request and provide our expertise on ultrafast metrology.

VERY EASY TO USE

Our 2 major products can be installed in only 2 minutes with no necessary calibration. It comes in an ultra compact (55x56x195mm) package for the long pulse model and a 55x56x265mm package for the fs one.

ACCURATE AND ALIGNMENT FREE

Our products are designed to provide accurate and reliable measurements, whatever the experimental conditions. They can yield proper measurements without caring about the accuracy of the alignment.

INTUITIVE, POWERFUL SOFTWARE

Our software can run either on Linux or Windows. It is highly optimized and specifically designed from the ground up to provide accurate control and readings of our products.

1. STFE Series Autocorrelators

Autocorrelators are used to measure pulse duration. The basic principle is to create two copies of the incoming beam, with a beam splitter. Those copies are superimposed in a nonlinear medium, where they interact generating a third beam. As the overlap of the two copies depends on the pulse duration, analysing the third beam allows to calculate the pulse duration.

We supply different types of autocorrelators. The ROC autocorrelator is a single-shot autocorrelator, thus it needs one single pulse to measure the duration. It is very compact and extremely easy to use. Only two minutes are necessary to get the measurement. The MS-ROC autocorrelator is a multi-shot autocorrelator. It uses an optical delay line to scan the delay, and each pulse allows to know the intensity for a particular delay. It can measure pulses with energy as low as 50 pJ.

1.1 STFE-ROC Series Ultra Compact Single-shot Autocorrelator (Alignment-free!)

autocorrelatorROC stands for Row Optical Correlator. Based on an ultra compact and robust inline setup, the ROC allows the measurement of single-shot autocorrelation traces. Specifically designed to offer the easiest user experience, they cannot be misaligned and no calibration or tweaking is needed. Also, they are easily transportable. And yes, they are rock-solid! Besides those advantages, the ROC autocorrelators provide excellent technical performances and highly accurate measurements. The ROC autocorrelators are available for different wavelength ranges and several pulse durations.

Features:

Models

STFE-ROC-FC

STFE-ROC-FS

STFE-ROC-PS1

STFE-ROC-PS3

STFE-ROC-PS5

STFE-ROC-PS10

Pulse duration range

min

5 fs

20 fs

50 fs

70 fs

100 fs

300 fs

max

150 fs

500 fs

1 ps

3 ps

5 ps

10 ps

Accessible spectral range (nm)

480 - 21001

800 - 21001

Input pulse repetition rate

single-shot to GHz2

Single-pulse measurement

up to 150 kHz laser repetition rate (with Enhanced detection option, or 40 kHz without)

Min input pulse energy3

Single-shot

1 µJ (10 nJ with low-energy option)

1 MHz

10 nJ (500 pJ with low-energy option)

1 GHz

50 pJ (low-energy option required)

Input polarization

linear horizontal or vertical

Detection

CMOS 12 Bits - 3 Mpx - 72 dB

PC Interface

USB 3.1 (or GigE as an option)

Beam height (mm)

adjustable from 30 mm

Dimensions (mm)

55 x 56 x 265

55 x 56 x 195

  1. Effective spectral bandwidth to be defined within the accessible spectral range according to customer's requirements
  2. The measurements are averaged over several pulses for laser with repetition rate higher than 150 kHz. Custom versions available on request. For lower power and wider pulse duration ranges, Multi-Shot scanning versions are available (STFE-MS-ROC).
  3. Those values give an order of magnitude. The exact sensitivity depends on many parameters (pulse duration, beam profile, wavelength…)

Options

Software:

Our software has been designed to be user friendly and intuitive. This is a modern software compatible with touchscreen that can run either under Linux or Windows. It allows distant control of the devices via PC, tablet or smartphone. We can also provide custom software developments upon request.

autocorrelator

Measurement of few cycle pulses: This is an autocorrelation measurement sample of ultrashort pulse that has been performed in Politecnico di Milano with our short pulse model autocorrelator. On the top, the raw image of the spatially resolved autocorrelation trace. At the bottom, the analysed autocorrelation trace integrated over the spatial coordinate. The experimental data (in red) are fitted by a Gaussian function (in blue). The full width at half maximum of the autocorrelation trace is 8.3 fs. The corresponding Gaussian pulse duration is 5.9 fs.

Measurement of low energy pulses: This measurement has been performed on a femtosecond Ti:Sapphire oscillator at LCAR with our autocorrelator. The average power used for the measurement was with only 20 mW at 62 MHz repetition rate. It means that in this conditions 0.3 nJ per pulse was enough to get a clean measurement. At the bottom, the raw image of the spatially resolved autocorrelation trace. On the top, the analysed autocorrelation trace integrated over the spatial coordinate. The experimental data (in blue) are fitted by a Gaussian function (in red). The full width at half maximum of the autocorrelation trace is 30.4 fs for a Gaussian pulse duration of 21.5 fs.

autocorrelatorautocorrelator

1.2 STFE-MS-ROC Series Multi-shot Autocorrelators

autocorrelatorMS-ROC stands for Multi-Shot Row Optical Correlator. The MS-ROC allows the measurement of autocorrelation traces. It is based on second harmonic generation, making it reliable and compact. It has been specially developed for sources with sub-nJ energy per pulse. It allows the measurement of pulses from 50 fs to 40 ps in the standard version. With its high scan speed, real-time operations is possible for measurement and optimization. The MS-ROC-LP can perform scan at 130 ps/s, making it the fastest scanning autocorrelator on the market. Also, the MS-ROC-SP allows the measurement of both ultra-short and long pulses thanks to its dual-mode (standard mode for pulse duration > 50 fs and fine-scan mode for pulse < 50 fs). Like every products, the MS-ROC is easy to install and use.

FEATURES

Models

STFE-MS-ROC

STFE-MS-ROC-LP

STFE-MS-ROC-SP

STFE-MS-ROC-SLP

Pulse duration range

min

50 fs

100 fs

5 fs

25 fs

max

40 ps

80 ps

40 ps

80 ps

Fine scan mode range

not applicable

not applicable

5 – 50 fs

25 – 500 fs

Accessible spectral range (nm)

480 - 2000 1

Minimum temporal resolution

6.7 fs

13.4 fs

standard : 6.7 fs

fine scan : 0.1 fs

standard : 13.4 fs

fine scan : 0.2 fs

Scan speed

> 65 ps/s

> 130 ps/s

standard : > 65 ps/s

fine scan : > 50 fs/s

standard : > 130 ps/s

fine scan : > 500 fs/s

Input pulse repetition rate

100 Hz to GHz 2

Min input pulse energy3

1 MHz

100 pJ

100 pJ

5 nJ

500 pJ

100 MHz

5 pJ

5 pJ

500 pJ

50 pJ

Input polarization

linear vertical

Detection

CMOS 12 Bits – 3 Mpx – 72 dB

PC Interface

USB 3.1

Beam height (mm)

69 - 148

Dimensions (mm)

222 x 194 x 129

326 x 194 x 129

  1. Effective spectral bandwidth to be defined within the accessible spectral range according to customer's requirements.
  2. Low repetition rate available as an option.
  3. Those values give an order of magnitude. The exact sensitivity depends on many parameters (pulse duration, beam profile, wavelength…)

OPTIONS:

SOFTWARE

Our software has been designed to be user friendly and intuitive. This is a modern software compatible with touchscreen that can run either under Linux or Windows. It allows distant control of the devices via PC, tablet or smartphone. We can also provide custom software developments upon request.

auto correlator

2. STFE-FROG Series Characterization of Ultrashort Pulses

FROG stands for Frequency-resolved Optical Gating. It is a technique for a complete characterization of ultrashort pulses, thus it can retrieve the full time-dependant electric field, and the equivalent optical spectrum with spectral phase. In other words, FROG allow you to know the duration of your pulses, but also how to deal with spectral phase to reach the shortest possible duration.FROG correlator

We supply two types of FROG. The Fast FROG is a single-shot FROG, thus it needs one single pulse to measure the duration. Its innovative algorithm allow a real-time pulse retrieval. The MS-FROG is a multi-shot FROG. It uses an optical delay line to scan the delay, and each pulse allows to know the intensity for a particular delay. It can measure pulses with energy as low as 50 pJ. The same device can measure very short pulses and longn pulses, from 5 fs to 80 ps !

2.1 Fast FROG Series Single-shot Measurement

FROG stands for Frequency Resolved Optical Gating. Based on Second Harmonic Generation, Fast FROG is reliable and compact. Key design features, such as the wavefront division technique and the use of our mini imaging spectrometer MISS, make the Fast FROG very easy to use and versatile while leading to accurate measurements. Six models are available, covering different pulse duration ranges from sub-5 fs to 10 ps, over a broad spectral range. Two designs are available: one for long pulses mainly relying on transmission optics, and one for ultrashort pulses which is fully achromatic.

Key features

Models

STFE-FROG-FC

STFE-FROG-FS

STFE-FROG-PS1

STFE-FROG-PS3

STFE-FROG-PS5

STFE-FROG-PS10

Pulse duration range

min

4 fs

10 fs

50 fs

100 fs

150 fs

300 fs

max

150 fs

250 fs

1 ps

3.5 ps

5 ps

10 ps

Accessible spectral range (nm)

480 - 21001

800 - 21001

Spectral Window Δλ (nm)

580 1

420 1

300 1

Input pulse repetition rate

single-shot to GHz2

Single-pulse measurement

Up to 150 kHz laser repetition rate (with Enhanced detection option, or 40 kHz without)

Min input pulse energy 3

Single-shot

250 µJ

1 µJ

1 µJ

1 kHz

10 µJ

100 nJ

50 nJ

50 MHz

20 nJ

1 nJ

200 pJ

1 GHz

n/a

50 pJ

25 pJ

Input polarization

linear horizontal or vertical

Detection

CMOS 12 Bits - 3 Mpx - 72 dB

PC Interface

USB 3.1 (or GigE as an option)

Beam height (mm)

69 - 148

Dimensions (mm)

326 x 194 x 129

  1. Effective spectral bandwidth to be defined within the accessible spectral range according to customer’s requirements. Additional spectrometers can be provided to address different spectral windows.
  2. The measurements are averaged over several pulses for laser with repetition rate higher than 150 kHz.
  3. Those values give an order of magnitude, with "low energy" option when applicable. The exact sensitivity depends on many parameters (pulse duration, beam profile, wavelength...)

Options:

2.2 MS-FROG Series Multi-shot Measurements

MS-FROG stands for Multi-Shot Frequency Resolved Optical Gating. The MS-FROG is based on second harmonic generation, making it reliable and compact. It has been specially developed for sources with energy per pulse of less than 1 nJ. It allows the measurement of pulses from 50 fs to 40 ps in the standard version. The scan speed is so high that it allows real-time operations for measurement and optimization. The MS-FROG-LP can perform scan at 130 ps/s, making it the fastest scanning FROG on the market. Also, the MS-FROG-SP allows the measurement of both ultra-short and long pulses thanks to its dual-mode (standard mode for pulse duration > 50 fs and fine-scan mode for pulse < 50 fs). On top of that, our recently developed algorithm allows to extract information from each recorded spectra instantaneously, leading to real time reconstruction of your pulses! Like every products, the MS-FROG is easy to install and use.

Key features

Models

STFE-MS-FROG

STFE-MS-FROG-SP

STFE-MS-FROG-LP

STFE-MS-FROG-SLP

Pulse duration range

min

50 fs

5 fs

100 fs

25 fs

max

40 ps

40 ps

80 ps

80 ps

Fine scan mode range

not applicable

5 - 50 fs

not applicable

25 - 500 fs

Accessible spectral range (nm)

500 - 20001

Spectral Window Δλ (nm)

From 200 to 700 1

Minimum temporal resolution

6.7 fs

standard : 6.7 fs

fine scan : 0.1 fs

13.4 fs

standard : 13.4 fs

fine scan : 0.2 fs

Scan speed

> 65 ps/s

standard : > 65 ps/s

fine scan : > 50 fs/s

> 130 ps/s

standard : > 130 ps/s

fine scan : > 500 fs/s

Input pulse repetition rate

100 Hz to GHz 2

Min input pulse energy 3

1 MHz

500 pJ

10 nJ

500 pJ

1 nJ

100 MHz

50 pJ

1 nJ

50 pJ

100 pJ

Input polarization

linear vertical

Detection

CMOS 12 Bits - 3 Mpx - 72 dB

PC Interface

USB 3.1

Beam height (mm)

69 - 148

Dimensions (mm)

326 x 194 x 129

  1. Effective spectral bandwidth to be defined within the accessible spectral range according to customer’s requirements. Additional spectrometers can be provided to address different spectral windows.
  2. Low repetition rate available as an option
  3. Those values give an order of magnitude. The exact sensitivity depends on many parameters (pulse duration, beam profile, wavelength...)

Options:

2.3 Software

Furthermore it is very user friendly, the FROG software comes with an optimized retrieval algorithm, that allows you to retrieve time and spectral information in real time.

ROC correlator

M2 Factor Meter   Laser Pulse Parameter Measurement System

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