| Summary: | 碩士 === 國立臺灣大學 === 電機工程學研究所 === 94 === The injection locking phenomenon appears when a source laser (or a “master” laser) with a appropriated injection power is injected into a free oscillating laser (slave laser), and detuned from the frequency of it. Depending on the frequency detuning and the injection power, the slave laser can be either stably, unstably locked, or become chaotic. The phase difference between master and slave laser is also related to the detuning, injection power, and locking bandwidth.
On the other hand, accurate optical phase control is always a challenge. This thesis proposes an approach, using the technique of optical injection locking, regarding to the carrier and sideband of a 823nm semiconductor laser, to control the phase between them。 We first prove by experiment that a beat note injecting radiation can also induce a beat note from the slave laser with the same frequency. Then we use this method to extract the phase signal by mixing the master and slave beat signal. By observing the phase signal we can change the frequency of the master or slave laser to control the phase difference between the carrier and sideband of the injection locked radiation.
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