Bienfang Joshua C, Denman Craig A, Grime Brent W, Hillman Paul D, Moore Gerald T, Telle John M
Directed Energy Directorate, Air Force Research Laboratory, Kirtland Air Force Base, New Mexico 87117, USA.
Opt Lett. 2003 Nov 15;28(22):2219-21. doi: 10.1364/ol.28.002219.
A 20-W all-solid-state continuous-wave single-frequency source tuned to the sodium D2a line at 589.159 nm has been developed for adaptive optical systems. This source is based on sum-frequency mixing two injection-locked Nd:YAG lasers in lithium triborate in a doubly resonant external cavity. Injection locking the Nd:YAG lasers not only ensures single-frequency operation but also allows the use of a single rf local oscillator for Pound-Drever-Hall locking both the injection-slave and the sum-frequency cavities. We observe power-conversion efficiencies in excess of 55% and a linearly polarized diffraction-limited output tunable across the sodium D2 line (589.156 to 589.160 nm) with no change in output power and with high amplitude and pointing stability.
已开发出一种20瓦全固态连续波单频光源，其调谐至589.159纳米的钠D2a线，用于自适应光学系统。该光源基于在双共振外腔的硼酸锂中对两台注入锁定的Nd:YAG激光器进行和频混合。对Nd:YAG激光器进行注入锁定不仅确保了单频运行，还允许使用单个射频本地振荡器对注入从腔和和频腔进行庞德-德雷弗-霍尔锁定。我们观察到功率转换效率超过55%，并且输出为线性偏振、衍射极限，可在钠D2线（589.156至589.160纳米）范围内调谐，输出功率不变，且具有高幅度和指向稳定性。
