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MOGlabs CEL User Manual

MOGlabs CEL
58 pages
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Cateye Laser
CEL, CEX and CEF
Revision 2.01
Serial numbers A323xxxxx
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MOGlabs CEL Specifications

General IconGeneral
BrandMOGlabs
ModelCEL
CategoryMeasuring Instruments
LanguageEnglish

Summary

Safety Precautions

Label identification

Description and location of laser warning and compliance labels.

Protection Features

Protection relay

Shorts laser diode when power is off or laser is off, via a normally-closed relay.

Emission indicator

LED illuminates when laser is switched on, with a delay before emission.

Interlock

Connection for safety interlock on laser head board.

Extending laser diode and piezo lifetime

1. Introduction

1.1 External cavity

External cavity formed by diode rear facet and cat-eye reflector, using a filter.

1.2 Piezo-electric frequency control

Adjusting laser frequency using a piezo electric actuator.

1.3 Temperature and current

Dependence of laser frequency on temperature and injection current.

2. First light

2.1 Standby/Run

Procedure for switching the laser between standby and run modes.

2.2 Current

Setting and adjusting the laser diode current.

2.3 Temperature

Optimal temperature settings and equilibrium time.

3. Operation

3.1 Power

Adjusting and comparing laser output power.

3.2 Wavelength

Adjusting laser wavelength using current, piezo, and filter.

3.3 Mode-hops

Understanding and identifying mode-hops in laser tuning.

3.4 Scanning

Controlling external cavity length for laser scanning.

3.5 Faraday isolator

Description, mounting, and alignment of Faraday isolators.

4. Troubleshooting

4.1 Scanning adjustment

Optimizing parameters for wide continuous mode-hop free wavelength scan.

4.1.1 BIAS optimisation

Optimizing feed-forward current bias for synchronizing cavity modes.

4.2 Filter adjustment

Description of filter angle adjustment for wavelength control.

4.3 Threshold optimisation

Optimizing the lasing threshold by adjusting focus and current.

4.4 Fibre coupling

Coupling the laser beam into a single-mode optical fibre.

4.4.1 Reverse beam: using a visual fault locator

Using a visual fault locator for initial beam alignment to fiber.

4.4.2 Mirror adjustment

Optimizing mirror positions for maximum fiber coupling efficiency.

A. Specifications

Wavelength/frequency

Specifications for laser wavelength and frequency parameters.

Sweep/scan

Specifications for laser scan range and mode-hop free range.

Optical

Specifications for beam size and polarization.

A.1 CEL mechanical (Rev9+)

A.2 CEX/CEF mechanical

B. Laser head board

B.1 B1045/1046 headboard

Details on B1045/B1046 headboards and RF coupling.

B.2 B1047/B1240 headboards

Details on B1047/B1240 headboards and SMA input.

B.3 Headboard connection to controller

Pinout and connection details for headboard to controller cable.

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