2.32 Thz Quantum Cascade Laser Frequency- Locked to the Harmonic of a Microwave Synthesizer Source References and Links
2.32 Thz Quantum Cascade Laser Frequency- Locked to the Harmonic of a Microwave Synthesizer Source References and Links
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通讯作者：
A. Danylov;A. Light;J. Waldman;N. Erickson;X. Qian;W. Goodhue;R. A. L. T. Betz;B. S. Boreiko
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作者：
A. Danylov;A. Light;J. Waldman;N. Erickson;X. Qian;W. Goodhue;R. A. L. T. Betz;B. S. Boreiko
利用肖特基二极管波导混频器实现了太赫兹量子级联激光器（QCL）对微波源谐波的稳频。2.32 THz、1.0毫瓦CW QCL耦合到混频器的信号端口，从微波合成器的谐波中得到的110 GHz信号耦合到IF端口。利用110 GHz的第21次谐波与QCL之间的差频来调节QCL偏置电流以稳定频率。短期频率抖动从550 kHz降低到4.5 kHz（FWHM），并消除了长期频率漂移。这种性能相比，其他几个太赫兹QCL频率稳定技术。3 THz量子级联激光器的频率和相位锁定控制，“单模太赫兹量子级联激光器的频率稳定到千赫兹水平“，”1.5太赫兹量子级联激光器的相位锁定并用作外差HEB接收器中的本地振荡器“，”2.7THz量子级联激光器的相位锁定到微波参考，“2.7 THz量子级联激光器到锁模掺铒光纤激光器的光学锁相“，”使用GaAs光混合器将2.5 THz量子级联激光器到频率梳的自然锁相“，”太赫兹量子级联激光器到分子吸收线的光学频率稳定，“使用气室的单模3.5太赫兹量子级联激光器的频率锁定“，”使用基于光纤的太赫兹梳参考频谱分析仪的连续波太赫兹辐射的实时监测“，“固态氮冷却的光学系统的长期频率和振幅稳定性，连续波THz量子级联激光器，“Proc. Terahertz quantum cascade lasers with large wall-plug efficiency“，Appl. Transformation of the multimode Terahertz quantum cascade laser beam into a Gaussian，using a hollow dielectric waveguide，“Appl. Terahertz sideband-tuned quantum cascade laser radiation，“Opt.
Frequency stabilization of a THz quantum cascade laser (QCL) to the harmonic of a microwave source has been accomplished using a Schottky diode waveguide mixer designed for harmonic mixing. The 2.32 THz, 1.0 milliwatt CW QCL is coupled into the signal port of the mixer and a 110 GHz signal, derived from a harmonic of a microwave synthesizer, is coupled into the IF port. The difference frequency between the 21st harmonic of 110 GHz and the QCL is used in a discriminator to adjust the QCL bias current to stabilize the frequency. The short-term frequency jitter is reduced from 550 kHz to 4.5 kHz (FWHM) and the long-term frequency drift is eliminated. This performance is compared to that of several other THz QCL frequency stabilization techniques. Frequency and phase-lock control of a 3 THz quantum cascade laser, " Opt. Frequency stabilization of a single mode terahertz quantum cascade laser to the kilohertz level, " Opt. Phase locking of a 1.5 Terahertz quantum cascade laser and use as a local oscillator in a heterodyne HEB receiver, " Opt. Phase Locking of a 2.7 THz quantum cascade laser to a microwave reference, " Opt. " Phase-locking of a 2.7-THz quantum cascade laser to a mode-locked erbium-doped fibre laser, " Nat. Phase-locking of a 2.5 THz quantum cascade laser to a frequency comb using a GaAs photomixer, " Opt. frequency stabilization of a terahertz quantum cascade laser to a molecular absorption line, " Appl. Frequency locking of single-mode 3.5-THz quantum cascade lasers using a gas cell, " Appl. Real-time monitoring of continuous-wave terahertz radiation using a fiber-based, terahertz-comb-referenced spectrum analyzer, " Opt. Long-term frequency and amplitude stability of a solid-nitrogen-cooled, continuous wave THz quantum cascade laser, " Proc. Terahertz quantum cascade lasers with large wall-plug efficiency, " Appl. Transformation of the multimode terahertz quantum cascade laser beam into a Gaussian, using a hollow dielectric waveguide, " Appl. Terahertz sideband-tuned quantum cascade laser radiation, " Opt.