Phase-locking of the beat signal of two distributed-feedback diode lasers to oscillators working in the MHz to THz range

被引：51

作者：

Friederich, Fabian ^{[1
]}

Schuricht, Gunter ^{[2
]}

Deninger, Anselm ^{[2
]}

Lison, Frank ^{[2
]}

Spickermann, Gunnar ^{[3
]}

Bolivar, Peter Haring ^{[3
]}

Roskos, Hartmut G. ^{[1
]}

机构：

[1] Goethe Univ Frankfurt, Inst Phys, D-60438 Frankfurt, Germany

[2] TOPTICA Photon AG, D-82166 Graefelfing, Germany

[3] Univ Siegen, Inst Hochstfrequenztech & Quantenelekt, D-57076 Siegen, Germany

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 08期

关键词：

CAVITY SEMICONDUCTOR-LASERS; MILLIMETER-WAVE SIGNALS; OPTICAL-GENERATION; GHZ; HETERODYNE; RESOLUTION; LINEWIDTH; INJECTION;

D O I：

10.1364/OE.18.008621

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present difference-frequency stabilization of free-running distributed-feedback (DFB) diode lasers, maintaining a stable phase-lock to a local oscillator (LO) signal. The technique has been applied to coherent hybrid THz imaging which employs a high-power electronic radiation source emitting at 0.62 THz and electro-optic detectors. The THz radiation of the narrow-band emitter is mixed with the difference frequency of the DFB diode laser pair. The resulting intermediate frequency is phase-locked to the LO signal from a radio-frequency generator using a fast laser-current control loop. The stabilization scheme can be adapted readily to a wide range of applications which require stabilized laser beat-notes. (C) 2010 Optical Society of America

引用

页码：8621 / 8629

页数：9

共 23 条

[1] Indium-tin-oxide-coated glass as dichroic mirror for far-infrared electromagnetic radiation [J].