8 September 2004 Operation of THz p-Ge laser in a closed-cycle refrigerator
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We report on development of a turn-key, cryogen-free bulk p-Ge laser which is broadly tunable over the range 1.5 to 4.2 THz. A 4 K closed cycle refrigerator was used to eliminate the need for liquid cryogen. A SmCo permanent magnet assembly provides the necessary magnetic field for the laser. A customized high voltage (HV) power supply and thyratron pulser were developed to replace the stack of general electronics previously used to operate the laser.
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Christopher J. Fredricksen, Christopher J. Fredricksen, Andrei V. Muravjov, Andrei V. Muravjov, Robert E. Peale, Robert E. Peale, "Operation of THz p-Ge laser in a closed-cycle refrigerator", Proc. SPIE 5411, Terahertz for Military and Security Applications II, (8 September 2004); doi: 10.1117/12.541946; https://doi.org/10.1117/12.541946

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