Electro-Optic Modulator

  • Update:Jun 13, 2017
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Products include E-O phase modulators beam deflectors associated drivers transverse field modulators laser noise-reduction systems and optical isolators.

Product Introduction

E-O modulators and modulation systems are used for pulse selection, regen-switching, video disk mastering and data recording. Products include E-O phase modulators, beam deflectors, associated drivers, transverse field modulators, laser noise-reduction systems, and optical isolators. We also manufacture, on a custom basis, intensity modulation systems with high frequency capabilities beyond 400MHz.

Most modulators are transverse field type Pockels Cells. In the original Pockels Cell design the optical beam is longitudinal to the electric field. In the new transverse design the optical beam is orthogonal to the electric field. The advantage of the transverse design is that it requires approximately 100 volts as opposed to the kilovolts required by the original design.

Features

Configurations:

ADP Crystal Series Wavelength Limits (240 to 800 nm)*

Model Number V ½ wave @ 500nm V ½ wave @ 830nm Aperture Diameter Resonances Contrast Ratio @ 633nm Length w/ Polarizer
STM370 184 306 2.5mm No 500:1 158mm
STM370 LA 263 437 3.5mm No 500:1 158mm
STM380 92 153 2.5mm No 500:1 253mm
STM390 115 190 3.5mm No 500:1 272mm

KD*P Crystal Series Wavelength Limits (240 to 1100nm)*

Model Number V ½ wave @ 500nm V ½ wave @ 830nm V ½ wave @ 1064nm Aperture Diameter Resonances Contrast Ratio @ 633nm &1064nm Length w/ Polarizer
STM350-50 455 757 970 3.1mm Yes 500:1,700:1 106mm
STM350-80 261 433 522 2.7mm Yes 500:1,700:1 137mm
STM350-80LA 360 600 720 3.5mm Yes 500:1,700:1 137mm
STM350-105 226 376 472 3.1mm Yes 500:1,700:1 162mm
STM350-160 130 216 275 2.7mm yes 300:1,500:1 215mm
STM350-210 113 188 240 3.1mm Yes 300:1,500:1 268mm

LTA Crystal Series Wavelength Limits (700 to 2000nm)

Model Number V ½ wave @ 830nm V ½ wave @ 1064nm V ½ wave @ 2500nm Aperture Diameter Resonances Contrast Ratio @ 1064nm Length w/ Polarizer
STM360-40 213 400 950 2.7mm Yes 200:1 95mm
STM360-80 143 183 430 2.7mm Yes 100:1 137mm
STM360-120 107 138 323 2.7mm Yes 100:1 174mm
STM360-160 71 92 215 2.7mm Yes 100:1 215mm

Amplifier Details

Model Bandwidth Rise/Fall Times Max. Output V Typical Drive Configuration Output
ST25A DC-to-25MHz 14ns 145 100 Ohms B.L. Linear
ST25D DC-to-30MHz 8ns 175 100 Ohms B.L. Digital
ST50 DC-to-50MHz 7ns 90 50 Ohms B.L. Linear
ST100 DC-to-100MHz 3.5ns 90 50 Ohms B.L. Linear
ST200 10Khz-to-200MHz 2ns 170 50 Ohms S.E. --
ST275 DC-to-8MHz 50ns 275 Lumped Capacitance Linear
ST302RM DC-to-250KHz 1 micro-sec 750 Lumped Capacitance Linear
ST302A DC-to-1MHz 350ns 350 Lumped Capacitance Linear
ST307 DC-to-50KHz 8ns 800 Lumped Capacitance Digital
ST505 5MHz-to-100MHz 3.5ns 44 50 Ohms S.E. --
ST550 20MHz-to-500MHz 1.5ns 140 50 Ohms S.E. --

 

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