CAJ | 학술논문

为了满足激光干涉成像，尤其是傅里叶望远镜成像对差频稳定的高功率光学外差干涉模式的需要，提出基于主振功放(MOPA)结构的光学外差干涉激光器的概念，并通过实验验证可行性。从原理上指出现有产生光学外差干涉模式方法的局限性，同时给出基于MOPA结构的光学外差干涉激光器的主要优点。指出基于MOPA结构的激光器可能存在明显影响相干性和产生光频漂移等的限制并设计实验验证。结果表明：功率放大过程对相干性没有明显影响，经过单级功放仍能保持线宽小于0.1 GHz (根据实测相干长度计算线宽约30 MHz)，功放过程和倍频过程对光频漂移无影响，实测频漂小于10 Hz，与声光移频器的频率稳定性相吻合，故推知频漂完全由移频器引起。
위료만족격광간섭성상，우기시부리협망원경성상대차빈은정적고공솔광학외차간섭모식적수요，제출기우주진공방(MOPA)결구적광학외차간섭격광기적개념，병통과실험험증가행성。종원리상지출현유산생광학외차간섭모식방법적국한성，동시급출기우MOPA결구적광학외차간섭격광기적주요우점。지출기우MOPA결구적격광기가능존재명현영향상간성화산생광빈표이등적한제병설계실험험증。결과표명：공솔방대과정대상간성몰유명현영향，경과단급공방잉능보지선관소우0.1 GHz (근거실측상간장도계산선관약30 MHz)，공방과정화배빈과정대광빈표이무영향，실측빈표소우10 Hz，여성광이빈기적빈솔은정성상문합，고추지빈표완전유이빈기인기。
In order to satisfy the requirement of laser interference imaging, especially Fourier telescope imaging, to generate frequency-stably high-power optical heterodyne interference mode, the concept of optical heterodyne interference laser based on the structure of MOPA was put forward and was proved by experiment. The limits of conventional method of generating optical heterodyne interference mode were pointed out and the main merits of optical heterodyne interference laser based on the structure of MOPA were presented. The possible limits of obvious effects on interference and inducing optical excursion were pointed out and were proved by experiment. The conclusion is given that the process of power amplification has no effect on interference and the line width is less than 0.1GHz by single amplification (based on real measurement of coherent length, the line width is about 30 MHz),and also that the processes of power amplification and frequency doubling has no effects on optical excursion and it is deduced that the real measurement of frequency excursion less that 10 Hz coinciding with frequency stability of AO frequency shifter was only related with frequency shifter.