hamamatsu industrial semiconductor laser repair

HAMAMATSU (Hamamatsu Photonics Co., Ltd.) is a leading optoelectronics manufacturer in Japan. Its laser product line is widely used in scientific research, medical, industrial and measurement fields. HAMAMATSU lasers are known for their high stability, long life and excellent optical performance.

Main product series

Semiconductor lasers: including visible light and infrared bands, with power ranging from mW to W

Solid-state lasers: such as Nd:YAG lasers, etc.

Gas lasers: including He-Ne lasers, etc.

Ultrafast lasers: femtosecond and picosecond laser systems

Quantum cascade lasers (QCL): used for mid-infrared spectroscopy applications

Typical application areas

Biomedical imaging and diagnosis

Material processing

Spectral analysis

Flow cytometry

Optical measurement

Scientific research

II. Common faults and diagnosis of HAMAMATSU lasers

1. Laser output power decreases

Possible causes:

Laser diode aging

Optical component contamination

Temperature control failure

Unstable power supply

Diagnostic methods:

Check whether the current-power curve deviates from the original data

Use a power meter to measure the actual output

Check the working status of the TEC (thermoelectric cooler)

2. Laser cannot start

Possible reasons:

Power failure

Control circuit problem

Interlock device triggered

Cooling system failure

Diagnostic steps:

Check the power indicator status

Verify interlock connection (such as safety switch, emergency stop button)

Measure power output voltage

Check the operation status of the cooling system

3. Deterioration of beam quality

Symptoms:

Increased beam divergence

Abnormal spot pattern

Decreased beam pointing stability

Possible reasons:

Misalignment of optical components

Contamination or damage of laser cavity mirror

Influence of mechanical vibration

Excessive temperature fluctuation

III. Maintenance methods of HAMAMATSU lasers

1. Daily maintenance

Cleaning and maintenance:

Regularly clean the optical window (use special lens paper and appropriate solvent)

Keep the laser surface clean to avoid dust accumulation

Check and clean the cooling fan and vents

Environmental monitoring:

Maintain a stable ambient temperature (recommended 20-25°C)

Control the humidity within the range of 40-60%

Avoid vibration and mechanical shock

2. Regular maintenance

Quarterly maintenance items:

Check that all cable connections are secure

Verify laser output parameters (power, wavelength, mode)

Calibrate power monitoring circuit (if equipped)

Check cooling system performance

Annual maintenance items:

Full optical system inspection

Replace aging parts (such as O-rings, seals)

Full system performance test

Software and firmware updates

IV. Troubleshooting process

Record fault phenomenon: Record the fault manifestation and occurrence conditions in detail

Check basic items:

Power connection

Safety interlock

Cooling system

Environmental conditions

Consult the technical manual: Refer to the equipment Fault codes and diagnostic guides provided

Step-by-step testing: check one by one according to the system modules

Contact technical support: For complex faults, contact our technical team for support in a timely manner

V. Suggestions for extending the life of the laser

Avoid frequent power on and off

Work within the recommended parameter range and do not overload

Maintain a good working environment

Perform preventive maintenance regularly

Use spare parts and consumables recommended by the original manufacturer

Establish a complete use and maintenance record

By following the above maintenance guidelines and troubleshooting methods, the reliability and service life of the HAMAMATSU laser can be significantly improved, ensuring its long-term stable operation. For complex problems, it is recommended to always consult our professional technical support team first.