Ultra-high precision mid-IR spectrometer I: Design and analysis of an optical fiber pumped difference-frequency generation source

2005 ◽  
Vol 82 (3) ◽  
pp. 479-486 ◽  
Author(s):  
D. Richter ◽  
P. Weibring
Keyword(s):  
Optical Fiber ◽  
High Precision ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Frequency Generation

scholarly journals Widely tunable difference frequency generation source for high-precision mid-infrared spectroscopy

2013 ◽  
Vol 21 (8) ◽  
pp. 9238 ◽  
Author(s):  
Chun-Chieh Liao ◽  
Yu-Hung Lien ◽  
Kuo-Yu Wu ◽  
Yan-Rung Lin ◽  
Jow-Tsong Shy
Keyword(s):  
Infrared Spectroscopy ◽  
High Precision ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy ◽  
Frequency Generation

High-precision CO_2 isotopologue spectrometer with a difference-frequency-generation laser source

2009 ◽  
Vol 34 (2) ◽  
pp. 172 ◽  
Author(s):  
Dirk Richter ◽  
Bryan P. Wert ◽  
Alan Fried ◽  
Petter Weibring ◽  
James G. Walega ◽  
...  
Keyword(s):  
High Precision ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Laser Source ◽  
Frequency Generation

scholarly journals Spectroscopic Imaging with an Ultra-Broadband (1–4 THz) Compact Terahertz Difference-Frequency Generation Source

Electronics ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 336
Author(s):  
Atsushi Nakanishi ◽  
Shohei Hayashi ◽  
Hiroshi Satozono ◽  
Kazuue Fujita
Keyword(s):  
Imaging Technique ◽  
Spectroscopic Imaging ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Quality Monitoring ◽  
Terahertz Emission ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Frequency Generation ◽  
Multi Mode

We demonstrate spectroscopic imaging using a compact ultra-broadband terahertz semiconductor source with a high-power, mid-infrared quantum cascade laser. The electrically pumped monolithic source is based on intra-cavity difference-frequency generation and can be designed to achieve an ultra-broadband multi-mode terahertz emission spectrum extending from 1–4 THz without any external optical setup. Spectroscopic imaging was performed with three frequency bands, 2.0 THz, 2.5 THz and 3.0 THz, and as a result, this imaging technique clearly identified three different tablet components (polyethylene, D-histidine and DL-histidine). This method may be highly suitable for quality monitoring of pharmaceutical materials.

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