SGER Award: A Novel Design for a Cavity-Dumped Millimeter- Wave Laser

由毫米波激光器组成的紧凑型CO2-CH 3F激光器系统 插入三镜CO2激光腔中的谐振腔， 光开关半导体腔倒空器，将进行测试。 的 腔倒空振荡器的特点是 主要是单纵模，窄线宽操作， 1.207mm. 它应该产生100千瓦量级的脉冲峰值功率， 命令10 ns持续时间。 这样的输出特性将被证明是有用的 新的实验涉及共振激发， 横向声波（TA）的电磁波 半导体超晶格 相干的单色TA声子可以 在GaAs锯齿掺杂超晶格中产生， 周期性交替的n型和p型掺杂片，当声子 波矢量k是2n/d（d =超晶格周期）的奇数倍， 谐振频率w=vk，其中v是TA声速。

A compact CO2-CH3F laser system consisting of a millimeter-wave resonator inserted in a three-mirror CO2 laser cavity with an optically-switched semiconductor cavity-dumper, will be tested. The cavity-dumped oscillator is expected to be characterized by predominantly single longitudinal mode, narrow linewidth operation at 1.207mm. It should produce peak powers of order 100kw in pulses of order 10ns duration. Such output characteristics will prove useful for new experiments involving the resonant excitation by electromagnetic waves of transverse acoustic (TA) waves in semiconductor superlattices. Coherent, monochromatic TA phonons can be generated in GaAs sawtooth-doping superlattices consisting of periodic alternating n- and p-type doped sheets, when the phonon wavevector k is an odd multiple of 2n/d (d = superlattice period) at the resonant frequency w=vk, where v is the TA sound velocity.