the output of Laser Pointer

Photodetector output light current; the additive noise introduced in the completion of the photoelectric conversion process should be as small as possible; fast response photodetector output photocurrent as much as possible to reproduce the waveform of the incident signal; stable reliable, good temperature stability and a longer working life. Finally talk about the packaging and lifetime of the laser components, the shell of the semiconductor laser package coaxial, dual in-line and butterfly three categories. The coaxial package assembly without semiconductor thermoelectric cooler and thermistor, is the simplest form of lasers, in CATV. The lean production of Laser Pointer has raised the output of Laser Pointer . The quality assurance of Laser Pointer has the high and strict requirement
Coaxial package is generally used for the return of two-way optical receiver module. The shortcomings of the dual in-line package is quite a long lead from the welding die Vice heat sink to the shell pin, coupled with the pin and very long lead inductance, this package does not apply to signal frequency is higher than 500MHZ for the occasion. Laser components commonly used in CATV optical transmitter applications butterfly package. As a result of lateral pin butterfly package pins from the die to the lead shorter, flat pin can be included into the external circuit of the PCB, as part of the microstrip line, so this structure the lead inductance and stray capacitance.  Laser Pointer is necessary to the large scale examination.
RF laser Notes (V1.2). Coolant temperature should be controlled between 15 ~ 30 ℃, if the ambient temperature are between 15 ~ 30 ℃ coolant temperature should be with them flat; If the ambient temperature is below 15 ° C or higher than 30 ° C (ambient temperature to allow range: 5 ~ 40 ° C), coolant lowest only to 15 ° C, up to 30 ℃. The principle is to avoid dew condensation lasers will be 100% damage to the laser. Especially in summer, when the dew point is higher than 30 degrees, it is necessary to stop using, or install air conditioning to reduce the temperature and humidity, thereby reducing the dew point. Do not use the laser, the coolant will be easier to cause condensation finished using the laser to cut off the chiller. The quality assurance of Laser Pointer has the high and strict requirement.
Recycled water only with distilled water or purified water, you can not use tap water, groundwater instead. The best is distilled water, pure water filter water as impurities and microorganisms equipment. If it does not distilled water, you can use purified water for drinking, but not recommended.