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Demonstration and investigation of pulsed injected locked solid-state laser oscillators with high frequency stability due to gain gratings without any active stabilization

脉冲注入锁定固态激光振荡器的演示和研究由于没有任何主动稳定的增益光栅而具有高频率稳定性

基本信息

批准号：
96663011
负责人：
Professor Dr. Ralf Menzel, since 4/2010
金额：
--
依托单位：
IBL Innovative Berlin Laser GmbH
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2011-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/96663011?language=en
关键词：
Demonstration investigation pulsed injected locked

项目摘要

The goal of this application is to investigate pulsed oscillators injection locked via gain gratings in loop resonators. The great advantage of such a scheme is its potential for high precision frequency stability without the need for any active stabilization circuit or actuator in contrast to state of the art frequency stabilization schemes. A stable monolithic non-planar ring oscillator will be used as seed laser that is injected into the high power loop. One of the loop resonator mirrors is a gain grating in the laser active material which is not fixed in position and thus can compensate for fluctuations of the resonator length. Single frequency operation can be realised very well in loop oscillators because of the coherence beam requirements to form the gain gratings and the Bragg selectivity of gain gratings themselves. A frequency locking of a loop oscillator emitting pulses with nanosecond duration, and energy in the mJ-range with identical frequencies or almost identical frequencies of the seed laser and loop oscillator with sub-MHz deviation was not demonstrated yet and will be in the focus of this application. The resonance behaviour of the loop will be investigated in detail. An injection locked pulsed solid state laser oscillator without active stabilization would be a major advance for many tasks in physics and technology especially for mobile lidar applications. In perspective such a scheme could be extended to continuous-wave-injection locking, or could be applied for coherent combination of laser sources.

本申请的目的是研究通过环形谐振器中的增益光栅注入锁定的脉冲振荡器。与现有技术的频率稳定方案相比，这种方案的最大优点是其具有高精度频率稳定性的潜力，而不需要任何有源稳定电路或致动器。一个稳定的单片非平面环形振荡器将被用来作为种子激光注入到高功率环。环形谐振器反射镜之一是激光活性材料中的增益光栅，其位置不固定，因此可以补偿谐振器长度的波动。由于形成增益光栅的相干光束要求和增益光栅本身的布拉格选择性，在环路振荡器中可以很好地实现单频操作。发射具有纳秒持续时间和mJ范围内的能量的脉冲的环路振荡器的频率锁定，其中种子激光器和环路振荡器具有相同的频率或几乎相同的频率，具有亚MHz的偏差，尚未被证明，并且将成为本申请的焦点。将详细研究回路的谐振行为。无主动稳定的注入锁定脉冲固体激光振荡器将是物理和技术领域的一个重大进展，特别是对于移动的激光雷达应用。在透视图中，这样的方案可以扩展到连续波注入锁定，或者可以应用于激光源的相干组合。