Precisely tunable continuous-wave terahertz source with interferometric frequency control

2008 ◽  
Vol 79 (4) ◽  
pp. 044702 ◽  
Author(s):  
Anselm J. Deninger ◽  
Thorsten Göbel ◽  
Daniel Schönherr ◽  
Thomas Kinder ◽  
Axel Roggenbuck ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Frequency Control ◽  
Terahertz Source

scholarly journals Ultrastable Offset-Locking Continuous Wave Laser to a Frequency Comb with a Compound Control Method for Precision Interferometry

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1248
Author(s):  
Ruitao Yang ◽  
Haisu Lv ◽  
Jing Luo ◽  
Pengcheng Hu ◽  
Hongxing Yang ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Control Method ◽  
Frequency Comb ◽  
Frequency Control ◽  
Beat Frequency ◽  
Laser Interferometry ◽  
Optical Frequency ◽  
Interference Signal ◽  
Compound Control ◽  
Cw Laser

A simple and robust analog feedforward and digital feedback compound control system is presented to lock the frequency of a slave continuous wave (CW) laser to an optical frequency comb. The beat frequency between CW laser and the adjacent comb mode was fed to an acousto-optical frequency shifter (AOFS) to compensate the frequency dithering of the CW laser. A digital feedback loop was achieved to expand the operation bandwidth limitation of the AOFS by over an order of magnitude. The signal-to-noise ratio of the interference signal was optimized using a grating-based spectral filtering detection unit. The complete system achieved an ultrastable offset-locking of the slave CW laser to the frequency comb with a relative stability of ±3.62 × 10−14. The Allan deviations of the beat frequency were 8.01 × 10−16 and 2.19 × 10−16 for a gate time of 10 s and 1000 s, respectively. The findings of this study may further improve laser interferometry by providing a simple and robust method for ultrastable frequency control.

Wide-band continuous-wave terahertz source with a vertically integrated photomixer

2009 ◽  
Vol 95 (16) ◽  
pp. 161102 ◽  
Author(s):  
E. Peytavit ◽  
J-F. Lampin ◽  
F. Hindle ◽  
C. Yang ◽  
G. Mouret
Keyword(s):  
Continuous Wave ◽  
Wide Band ◽  
Terahertz Source

scholarly journals A compact, continuous-wave terahertz source based on a quantum-cascade laser and a miniature cryocooler

2010 ◽  
Vol 18 (10) ◽  
pp. 10177 ◽  
Author(s):  
H. Richter ◽  
M. Greiner-Bär ◽  
S. G. Pavlov ◽  
A. D. Semenov ◽  
M. Wienold ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Continuous Wave ◽  
Terahertz Source ◽  
Quantum Cascade

scholarly journals Design of a continuous-wave tunable terahertz source using waveguide-phase-matched GaAs

2008 ◽  
Vol 16 (14) ◽  
pp. 10427 ◽  
Author(s):  
Alireza Marandi ◽  
Thomas E. Darcie ◽  
Poman P. M. So
Keyword(s):  
Continuous Wave ◽  
Terahertz Source

scholarly journals Continuous-wave optical parametric terahertz source

2009 ◽  
Vol 17 (25) ◽  
pp. 22303 ◽  
Author(s):  
Rosita Sowade ◽  
Ingo Breunig ◽  
Iván Cámara Mayorga ◽  
Jens Kiessling ◽  
Cristian Tulea ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Terahertz Source ◽  
Optical Parametric
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