A 3.5-mW continuous-wave difference-frequency source around 3 ,um for sub-doppler molecular spectroscopy

2006 ◽  
Author(s):  
P. Maddaloni ◽  
G. Gagliardi ◽  
P. Malara ◽  
P. De Natale
Keyword(s):  
Continuous Wave ◽  
Molecular Spectroscopy ◽  
Difference Frequency ◽  
Frequency Source

A 3.5-mW continuous-wave difference-frequency source around 3 μm for sub-Doppler molecular spectroscopy

2005 ◽  
Vol 80 (2) ◽  
pp. 141-145 ◽  
Author(s):  
P. Maddaloni ◽  
G. Gagliardi ◽  
P. Malara ◽  
P. De Natale
Keyword(s):  
Continuous Wave ◽  
Molecular Spectroscopy ◽  
Difference Frequency ◽  
Frequency Source

scholarly journals Direct Observation of Terahertz Frequency Comb Generation in Difference-Frequency Quantum Cascade Lasers

2021 ◽  
Vol 11 (4) ◽  
pp. 1416
Author(s):  
Luigi Consolino ◽  
Malik Nafa ◽  
Michele De Regis ◽  
Francesco Cappelli ◽  
Saverio Bartalini ◽  
...  
Keyword(s):  
Near Infrared ◽  
Quantum Cascade Lasers ◽  
Molecular Spectroscopy ◽  
Frequency Comb ◽  
Frequency Standard ◽  
Difference Frequency ◽  
Heterodyne Detection ◽  
Optical Rectification ◽  
Total Output ◽  
Quantum Cascade

Terahertz quantum cascade laser sources based on intra-cavity difference frequency generation from mid-IR devices are an important asset for applications in rotational molecular spectroscopy and sensing, being the only electrically pumped device able to operate in the 0.6–6 THz range without the need of bulky and expensive liquid helium cooling. Here we present comb operation obtained by intra-cavity mixing of a distributed feedback laser at λ = 6.5 μm and a Fabry–Pérot device at around λ = 6.9 μm. The resulting ultra-broadband THz emission extends from 1.8 to 3.3 THz, with a total output power of 8 μW at 78 K. The THz emission has been characterized by multi-heterodyne detection with a primary frequency standard referenced THz comb, obtained by optical rectification of near infrared pulses. The down-converted beatnotes, simultaneously acquired, confirm an equally spaced THz emission down to 1 MHz accuracy. In the future, this setup can be used for Fourier transform based evaluation of the phase relation among the emitted THz modes, paving the way to room-temperature, compact, and field-deployable metrological grade THz frequency combs.

Investigation of Conversion Efficiency of Widely Tunable Continuous-Wave Mid-IR Difference Frequency Generation Fiber-type Laser

2008 ◽  
Vol 28 (2) ◽  
pp. 295-300
Author(s):  
蒋建 Jiang Jian ◽  
李晓芹 Li Xiaoqin ◽  
冯素娟 Feng Sujuan ◽  
王执山 Wang Zhishan ◽  
毛庆和 Mao Qinghe ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Continuous Wave ◽  
Fiber Type ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Frequency Generation

Ranging Technology for Frequency Modulated Continuous Wave Laser Based on Phase Difference Frequency Measurement

2018 ◽  
Vol 45 (11) ◽  
pp. 1104002
Author(s):  
吉宁可 Ji Ningke ◽  
张福民 Zhang Fumin ◽  
曲兴华 Qu Xinghua ◽  
张桐 Zhang Tong ◽  
张铁犁 Zhang Tieli ◽  
...  
Keyword(s):  
Phase Difference ◽  
Continuous Wave ◽  
Frequency Measurement ◽  
Difference Frequency ◽  
Continuous Wave Laser ◽  
Wave Laser

scholarly journals High power and spectral purity continuous-wave photonic THz source tunable from 1 to 4.5 THz for nonlinear molecular spectroscopy

2013 ◽  
Vol 15 (10) ◽  
pp. 105014 ◽  
Author(s):  
J Kiessling ◽  
I Breunig ◽  
P G Schunemann ◽  
K Buse ◽  
K L Vodopyanov
Keyword(s):  
High Power ◽  
Continuous Wave ◽  
Molecular Spectroscopy ◽  
Spectral Purity
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