We demonstrate a miniature self-injection locked distributed-feedback laser using resonant optical feedback from a high-Q crystalline whispering-gallery-mode resonator. The linewidth reduction factor is greater than 10,000, with resultant instantaneous linewidth of less than 200 Hz. The minimal value of the Allan deviation for the laser-frequency stability is 3 X 10~(-12) at the integration time of 20 (mu)s. The laser possesses excellent spectral purity and good long-term stability.
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机译：我们演示了使用来自高Q晶体耳语画廊模式共振器的共振光反馈的微型自注入锁定分布式反馈激光器。线宽减小系数大于10,000，结果瞬时线宽小于200 Hz。在20μs的积分时间内，激光频率稳定性的Allan偏差的最小值为3 X 10〜（-12）。该激光器具有出色的光谱纯度和良好的长期稳定性。
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