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中文摘要：
为获得稳定输出的全固态蓝光激光器，在考虑了准三能级Nd：YAG晶体的自吸收损耗、热致透镜效应的基础上，设计了4镜环形谐振腔，采用激光二极管（LD）端面抽运复合Nd：YAG激光晶体，在腔内插入布儒斯特片作为起偏器，由A／2波片和TGG晶体组成单向器，通过周期极化KTP（PPKTP）内腔倍频，实现了连续单频运转的473nm蓝光激光器。当激光二极管的抽运功率为20W时，最大连续单频473nm蓝光输出功率为770mw，长期功率稳定性优于±2．2％。利用电子伺服系统将激光器的频率锁定在共焦法-珀（F-P）腔的共振透射峰上，蓝光激光的频率稳定性优于±5MHz／min。
英文摘要：
Considering the reabsorption and thermal lens of Nd： YAG crystal when the laser operates on the transitions at 946 nm, a ring laser cavity formed by four mirrors was designed. Using a Brewster plate as a polarizer, a half-wave-plate and a TGG crystal as the optical diode and PPKTP as the frequency doubling crystal, a laser diode end-pumped 473 nm continuous wave single frequency Nd：YAG laser was demonstrated experimentally. The single frequency output power at 473 nm is 770 mW with pump power of 20 W. The long term power fluctuation is less than ±2.2 %. Mter the laser was locked to the confocal Fabry-Perot cavity resonance, the measured frequency stability of blue laser is better than ±5 MHz/min.
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