scholarly journals Broadband, few-cycle mid-infrared continuum based on the intra-pulse difference frequency generation with BGSe crystals

2020 ◽  
Vol 28 (25) ◽  
pp. 37903
Author(s):  
Jinwei Zhang ◽  
Qing Wang ◽  
Jingjie Hao ◽  
Heyan Liu ◽  
Jiyong Yao ◽  
...  
Keyword(s):  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Mid Infrared ◽  
Frequency Generation ◽  
Infrared Continuum

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.

scholarly journals Flexible Electro-Optic, Single-Crystal Difference Frequency Generation Architecture for Ultrafast Mid-Infrared Dual-Comb Spectroscopy

ACS Photonics ◽  
2018 ◽  
Vol 5 (6) ◽  
pp. 2348-2353 ◽  
Author(s):  
Borja Jerez ◽  
Pedro Martín-Mateos ◽  
Frederik Walla ◽  
Cristina de Dios ◽  
Pablo Acedo
Keyword(s):  
Single Crystal ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Mid Infrared ◽  
Electro Optic ◽  
Frequency Generation

scholarly journals Widely-tunable mid-infrared frequency comb source based on difference frequency generation

2012 ◽  
Vol 37 (12) ◽  
pp. 2232 ◽  
Author(s):  
Axel Ruehl ◽  
Alessio Gambetta ◽  
Ingmar Hartl ◽  
Martin E. Fermann ◽  
Kjeld S. E. Eikema ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Mid Infrared ◽  
Frequency Generation

Mid-infrared multi-mode absorption spectroscopy, MUMAS, using difference frequency generation

2014 ◽  
Vol 118 (3) ◽  
pp. 343-351 ◽  
Author(s):  
Henry Northern ◽  
Seamus O’Hagan ◽  
Michelle L. Hamilton ◽  
Paul Ewart
Keyword(s):  
Absorption Spectroscopy ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Mid Infrared ◽  
Frequency Generation ◽  
Multi Mode

Efficient Mid-Infrared Difference-Frequency Generation Technology Based on Passive All-Optical Synchronization

2020 ◽  
Vol 40 (20) ◽  
pp. 2036001
Author(s):  
徐明航 Xu Minghang ◽  
武佳美 Wu Jiamei ◽  
李博文 Li Bowen ◽  
江云峰 Jiang Yunfeng ◽  
郝强 Hao Qiang ◽  
...  
Keyword(s):  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Mid Infrared ◽  
All Optical ◽  
Frequency Generation ◽  
Generation Technology

Broadband mid-infrared pulse via intra-pulse difference frequency generation based on supercontinuum from multiple thin plates

2019 ◽  
Vol 28 (11) ◽  
pp. 114203
Author(s):  
Hang-Dong Huang ◽  
Chen-Yang Hu ◽  
Hui-Jun He ◽  
Hao Teng ◽  
Zhi-Yuan Li ◽  
...  
Keyword(s):  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Thin Plates ◽  
Mid Infrared ◽  
Frequency Generation

scholarly journals Mid-infrared optical frequency comb in the 2.7–4.0 μm range via difference frequency generation from a compact laser system

2020 ◽  
Vol 8 ◽  
Author(s):  
Lian Zhou ◽  
Yang Liu ◽  
Gehui Xie ◽  
Chenglin Gu ◽  
Zejiang Deng ◽  
...  
Keyword(s):  
Repetition Rate ◽  
Near Infrared ◽  
Quantum Noise ◽  
Frequency Comb ◽  
Laser System ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Average Output ◽  
Mid Infrared ◽  
Frequency Generation

Abstract We report on the generation of a mid-infrared (mid-IR) frequency comb with a maximum average output power of 250 mW and tunability in the 2.7–4.0 μm region. The approach is based on a single-stage difference frequency generation (DFG) starting from a compact Yb-doped fiber laser system. The repetition rate of the near-infrared (NIR) comb is locked at 75 MHz. The phase noise of the repetition rate in the offset-free mid-IR comb system is measured and analyzed. Except for the intrinsic of NIR comb, environmental noise at low frequency and quantum noise at high frequency from the amplifier chain and nonlinear spectral broadening are the main noise sources of broadening the linewidth of comb teeth, which limits the precision of mid-IR dual-comb spectroscopy.

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