8–12 μm generation using difference frequency generation in AgGaSe2 of a Nd: YAG pumped KTP OPO

1997 ◽  
Author(s):  
Richard Utano ◽  
Michael J. Ferry
Keyword(s):  
Difference Frequency Generation ◽  
Difference Frequency ◽  
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.

Spectroscopic imaging with a compact terahertz difference frequency generation source

2021 ◽  
Author(s):  
Atsushi Nakanishi ◽  
Koichiro Akiyama ◽  
Shohei Hayashi ◽  
Hiroshi Satozono ◽  
Kazuue Fujita
Keyword(s):  
Spectroscopic Imaging ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Frequency Generation

High-efficiency terahertz wave generation with multiple frequencies by optimized cascaded difference frequency generation*

2021 ◽  
Vol 30 (4) ◽  
pp. 044211
Author(s):  
Zhongyang Li ◽  
Binzhe Jiao ◽  
Wenkai Liu ◽  
Qingfeng Hu ◽  
Gege Zhang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Difference Frequency Generation ◽  
Terahertz Wave ◽  
Wave Generation ◽  
Difference Frequency ◽  
Multiple Frequencies ◽  
Frequency Generation
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