CW Terahertz Wave Generation with Laser Diode Pumping and Its Applications for High-Resolution Terahertz Spectroscopy
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- Tanabe Tadao
- Department of Materials Science, Graduate School of Engineering, Tohoku University
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- Dezaki Hikari
- Department of Materials Science, Graduate School of Engineering, Tohoku University
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- Ragam Srinivasa
- Department of Materials Science, Graduate School of Engineering, Tohoku University
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- Oyama Yutaka
- Department of Materials Science, Graduate School of Engineering, Tohoku University
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- Nishizawa Jun-ichi
- Sophia University
Bibliographic Information
- Other Title
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- 半導体レーザ励起CWテラヘルツ波光源による高分解能分光応用
- ハンドウタイ レーザレイキ CW テラヘルツハ コウゲン ニ ヨル コウ ブンカイノウ ブンコウ オウヨウ
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Abstract
We have developed a high-resolution and continuous-wave (CW) terahertz spectroscopic system based on difference frequency generation (DFG) with an excitation of phonon-polariton in Gallium phosphide (GaP). The pump and signal near-infrared (NIR) lasers used in this system are an external cavity laser diode (ECLD) and a distributed feedback laser diode (DFB), respectively. Each line width of the NIR laser is less than 4 MHz, thus the quality factor Q of generated THz waves is more than 106. The terahertz wave frequency can be tuned automatically by changing wavelength of the DFB laser. As an example for the THz spectroscopic application for non-destructive inspection of ultra high molecular weight polyethylene (UHMWPE), we have shown terahertz spectra of UHMWPE with some degrees of deformation.<br>
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 74 (3), 153-157, 2010
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390001206479673216
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- NII Article ID
- 130004456123
- 10026269277
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL BIB ID
- 10590790
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed