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          Electro-optic Modulator

 

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:

          2 or 4 crystal configurations

          Designed to minimize the natural net birefringence

          Require DC offset voltage to set the quiescent operating point

          Supplied with an output polarizer, pre-aligned to the crystal axes

          Require either that the input laser is polarized or use of an auxiliary polarizer at the input

          Filled with index matching fluid

Note: Window assemblies should not be removed

 

Configurations:

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

Model Number

V wave @ 500nm

V 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 wave @ 500nm

V wave @ 830nm

V 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 wave @ 830nm

V wave @ 1064nm

V 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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Sintec Optronics Pte Ltd

10 Bukit Batok Crescent #07-02 The Spire Singapore 658079

Tel: +65 63167112 Fax: +65 63167113  

E-mail: sales@sintec.sg sales@SintecOptronics.com

URL: http://www.sintec.sghttp://www.SintecOptronics.com

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