| Summary: | 碩士 === 國立暨南國際大學 === 電機工程學系 === 98 === The main purpose of this thesis is to compare the laser diode opto-electrical characteristic to be controlled by continual wave(CW) and pulse wave(PW) mode at different control system. The control circuit include automatic current control circuit(ACC), automatic electrical power control circuit(AEC), automatic optical power control circuit APC(with PD) and automatic optical power control circuit APC(without PD), the main purpose use feedback compensation principle to reduce temperature effects on system.
In CW mode, APC(with PD) and APC(without PD) have good performance with characteristic of optical power stability, AEC has good performance with characteristic of electrical power stability, and ACC has good performance with short wavelength shift of laser diode. The short duty cycle of PW mode has good performance whatever characteristic of optical power stability, electrical power stability or wavelength shift of laser diode.
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