AMRL004 series frequency stabilized phase locked laser for wind lidar

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AMRL004 series frequency stabilized phase locked laser for wind lidar
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AMRL-004 series frequency-stable phase-locked light source is widely used in the fields of lidar, precision spectrum, sensor and measurement. It consists of two important modules: frequency stabilization control and phase locking control.

Laser frequency stabilization module is designed with modular miniaturization. A narrow linewidth laser, a gas absorption optical circuit and an electronic feedback module are integrated. Supports absorption edge midpoint frequency stabilization and PDH frequency stabilization. Seed laser output with 100 mW frequency stability is achieved.

The phase-locked control electronics module supports maximum 10GHz frequency shift range and 2MHz phase-locked accuracy. The module includes: high-precision seed-driven temperature control circuit, digital frequency and phase discriminator and loop filter, PID feedback control circuit of LD current, PID feedback control circuit of LD temperature control, multi-channel AD acquisition and DA output.

Iodine molecule Doppler absorption sideline frequency stabilization technology locks the midpoint of each absorption line sideline. A high-speed GA feedback control module, a three-stage frequency stabilization environment monitoring system and optical power feedback technology are used. To achieve long time and high stability frequency-locked laser output. The upper computer stores the parameters of each absorption line and can switch freely between 1104 and 1111 lines. The system locks automatically after unlocking. At the same time, the frequency-stabilized wavelength can be manually calibrated at any time.

Multi-level environmental control system and power feedback technology improve the long-term frequency stability and environmental adaptability of the module. The peak of laser frequency change is 6MHz at 17℃. Under ambient temperature (temperature difference < 3℃), the peak of output laser frequency is <2MHz, RMS value is <0.3MHz, and the best value of Allen variance value is 9.8 × 10-11@10 S, for long hours at 10-9@8000s.

UL-50mW-1064nm-AMRL004 parameters

ParameterData
ModelUL-50mW-1064nm-AMRL004
Wavelength1064.4nm
Output light power＞50mW
Working modeCW
Line width＜2MHz
Frequency stability (RMS)< 1MHz @ 24 h @ 3℃ Temperature difference
Power stability (RMS)≤1%@ 25℃
Repeated locking error＜100MHz
Relative intensity noise＜-140@10MHz
Frequency stabilization rangeIodine molecule 1104-1110 absorption line
Lock positionMidpoint of absorption line
Frequency shift range (optional)±5GHz
Lock-in accuracy (optional)2MHz
Output modeOptical fiber output, FC/APC
Communication interfaceRS422 communication protocol
Power supply220V AC
Size3.5u chassis
Wrking temperature15～30℃
Storage temperature0～50℃
Relative humidity0～60%

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