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HIGH-POWER MULTI-FUNCTION MILLIMETER-WAVE SIGNAL GENERATION USING OPO AND DFG
HIGH-POWER MULTI-FUNCTION MILLIMETER-WAVE SIGNAL GENERATION USING OPO AND DFG
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机译:使用OPO和DFG生成高功率多功能毫米波信号
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摘要
Apparatus and method for high-power multi-function millimeter-wavelength (THz-frequency) signal generation using OPO and DFG in a single cavity. In some embodiments, the OPO-DFG cavity includes an optical parametric oscillator (OPO) non-linear material that receives pump light IP having pump-light frequency and generates two different lower intermediate frequencies of light - an OPO-signal beam IS and a spatially/temporally overlapping OPO-idler beam II. A difference-frequency generator non-linear material then receives the two intermediate-frequency beams II and IS, and the DFG then generates a THz-frequency output signal that has a frequency equal to the difference between the two intermediate frequencies. In some embodiments, a single-piece crystal of non-linear material is used for both OPO and DFG functions. Some embodiments use a bow-tie ring having four mirrors that define the optical path: an IP-beam-entry mirror, an IP-light-extraction mirror to remove unconverted IP-beam, an II-beam-extraction mirror, and an IS-beam-extraction mirror, and a fifth ITHz-beam-extraction mirror.
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机译:在单个腔体中使用OPO和DFG产生高功率多功能毫米波(THz频率)信号的设备和方法。在一些实施例中,OPO-DFG腔包括光学参量振荡器(OPO)非线性材料,该非线性材料接收具有泵浦光频率的泵浦光I P Sub>并产生两个不同的较低的中频光。 OPO信号光束I S Sub>和空间/时间重叠的OPO闲置光束I I Sub>。差频发生器非线性材料然后接收两个中频光束II和IS,然后DFG生成太赫兹频率输出信号,该信号的频率等于两个中频之差。在一些实施例中,非线性材料的单块晶体被用于OPO和DFG功能。一些实施例使用具有四个限定光路的反射镜的领结环:IP光束入射镜,IP光提取镜以去除未转换的I P Sub>光束,II-光束提取镜,IS光束提取镜和第五个I THz Sub>光束提取镜。
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