CAJ | 학술논문

兰姆凹陷稳频激光器中，在压电陶瓷的调整范围内会周期性出现多个兰姆凹陷曲线波形，不同兰姆凹陷曲线的切换点处激光器的输出功率为极小值，与兰姆凹陷点的特征相同。制造工艺无法保证激光器切换点处的输出功率极小值一定大于或小于凹陷点处的功率极小值，因此无法通过激光输出功率及调制输出信号的相位关系直接区分切换点和凹陷点。经过分析兰姆凹陷现象的形成原因、推导兰姆凹陷曲线表达式、分析兰姆凹陷线型特点，发现兰姆凹陷曲线在凹陷区域两侧各有一波形拐点，在拐点附近，一次导数曲线会发生跳变，而在凹陷区域则无此现象。这一特点可以作为软件自动识别切换点和凹陷点的判据，实现自动兰姆凹陷稳频。
란모요함은빈격광기중，재압전도자적조정범위내회주기성출현다개란모요함곡선파형，불동란모요함곡선적절환점처격광기적수출공솔위겁소치，여란모요함점적특정상동。제조공예무법보증격광기절환점처적수출공솔겁소치일정대우혹소우요함점처적공솔겁소치，인차무법통과격광수출공솔급조제수출신호적상위관계직접구분절환점화요함점。경과분석란모요함현상적형성원인、추도란모요함곡선표체식、분석란모요함선형특점，발현란모요함곡선재요함구역량측각유일파형괴점，재괴점부근，일차도수곡선회발생도변，이재요함구역칙무차현상。저일특점가이작위연건자동식별절환점화요함점적판거，실현자동란모요함은빈。
In the Lamp Dip frequency stabilized laser, there are several Lamp Dip figures in the adjustment range of PZT. The switch points of different Lamp Dip figures are dip points, just as the Lamp Dip points. And we can not eliminate those dip points from real Lamp Dip points by the laser power or the phase of modulation signals. After analyzing the reason of Lamp Dip phenomenon, deriving the formula of Lamp Dip, and discussing the features of Lamp Dip curve, we found that there is an inflexion point on each side of Lamp Dip curve, and the differential curve of Lamp Dip has a jumping at those points. This character can be used by embedded system to distinguish the switch point and the Lamp Dip point.