Show simple item record

dc.contributor.authorMei, Jialin
dc.contributor.authorZhong, Kai
dc.contributor.authorWang, Maorong
dc.contributor.authorLiu, Pengxiang
dc.contributor.authorXu, Degang
dc.contributor.authorWang, Yuye
dc.contributor.authorShi, Wei
dc.contributor.authorYao, Jianquan
dc.contributor.authorNorwood, Robert A.
dc.contributor.authorPeyghambarian, Nasser
dc.date.accessioned2017-03-28T00:58:01Z
dc.date.available2017-03-28T00:58:01Z
dc.date.issued2016-11-03
dc.identifier.citationJialin Mei ; Kai Zhong ; Maorong Wang ; Pengxiang Liu ; Degang Xu ; Yuye Wang ; Wei Shi ; Jianquan Yao ; Robert A. Norwood and Nasser Peyghambarian " Compact high-repetition-rate terahertz source based on difference frequency generation from an efficient 2-μm dual-wavelength KTP OPO ", Proc. SPIE 10030, Infrared, Millimeter-Wave, and Terahertz Technologies IV, 100301Q (November 3, 2016); doi:10.1117/12.2245692; http://dx.doi.org/10.1117/12.2245692en
dc.identifier.issn0277-786X
dc.identifier.doi10.1117/12.2245692
dc.identifier.urihttp://hdl.handle.net/10150/622890
dc.description.abstractA compact optical terahertz (THz) source was demonstrated based on an efficient high-repetition-rate doubly resonant optical parametric oscillator (OPO) around 2 mu m with two type-II phase-matched KTP crystals in the walk-off compensated configuration. The KTP OPO was intracavity pumped by an acousto-optical (AO) Q-switched Nd:YVO4 laser and emitted two tunable wavelengths near degeneracy. The tuning range extended continuously from 2.068 mu m to 2.191 mu m with a maximum output power of 3.29 W at 24 kHz, corresponding to an optical-optical conversion efficiency (from 808 nm to 2 mu m) of 20.69%. The stable pulsed dual-wavelength operation provided an ideal pump source for generating terahertz wave of micro-watt level by the difference frequency generation (DFG) method. A 7.84-mm-long periodically inverted quasi-phase-matched (QPM) GaAs crystal with 6 periods was used to generate a terahertz wave, the maximum voltage of 180 mV at 1.244 THz was acquired by a 4.2-K Si bolometer, corresponding to average output power of 0.6 mu W and DFG conversion efficiency of 4.32x10(-7). The acceptance bandwidth was found to be larger than 0.35 THz (FWHM). As to the 15-mm-long GaSe crystal used in the type-II collinear DFG, a tunable THz source ranging from 0.503 THz to 3.63 THz with the maximum output voltage of 268 mV at 1.65 THz had been achieved, and the corresponding average output power and DFG conversion efficiency were 0.9 mu W and 5.86x10(-7) respectively. This provides a potential practical palm-top tunable THz sources for portable applications.
dc.language.isoenen
dc.publisherSPIE-INT SOC OPTICAL ENGINEERINGen
dc.relation.urlhttp://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2245692en
dc.rights© 2016 SPIEen
dc.subjectTerahertz (THz)en
dc.subjectoptical parametric oscillator (OPO)en
dc.subjectdifference frequency generation (DFG)en
dc.subjectgallium arsenide (GaAs)en
dc.subjectgallium selenide (GaSe)en
dc.titleCompact high-repetition-rate terahertz source based on difference frequency generation from an efficient 2-μm dual-wavelength KTP OPOen
dc.typeProceedingsen
dc.contributor.departmentUniv Arizona, Coll Opt Scien
dc.identifier.journalINFRARED, MILLIMETER-WAVE, AND TERAHERTZ TECHNOLOGIES IVen
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
dc.contributor.institutionTianjin Univ. (China)
dc.contributor.institutionTianjin Univ. (China)
dc.contributor.institutionTianjin Univ. (China)
dc.contributor.institutionTianjin Univ. (China)
dc.contributor.institutionTianjin Univ. (China)
dc.contributor.institutionTianjin Univ. (China)
dc.contributor.institutionTianjin Univ. (China)
dc.contributor.institutionTianjin Univ. (China)
dc.contributor.institutionCollege of Optical Sciences, The Univ. of Arizona (United States)
dc.contributor.institutionCollege of Optical Sciences, The Univ. of Arizona (United States)
refterms.dateFOA2018-09-11T18:02:22Z
html.description.abstractA compact optical terahertz (THz) source was demonstrated based on an efficient high-repetition-rate doubly resonant optical parametric oscillator (OPO) around 2 mu m with two type-II phase-matched KTP crystals in the walk-off compensated configuration. The KTP OPO was intracavity pumped by an acousto-optical (AO) Q-switched Nd:YVO4 laser and emitted two tunable wavelengths near degeneracy. The tuning range extended continuously from 2.068 mu m to 2.191 mu m with a maximum output power of 3.29 W at 24 kHz, corresponding to an optical-optical conversion efficiency (from 808 nm to 2 mu m) of 20.69%. The stable pulsed dual-wavelength operation provided an ideal pump source for generating terahertz wave of micro-watt level by the difference frequency generation (DFG) method. A 7.84-mm-long periodically inverted quasi-phase-matched (QPM) GaAs crystal with 6 periods was used to generate a terahertz wave, the maximum voltage of 180 mV at 1.244 THz was acquired by a 4.2-K Si bolometer, corresponding to average output power of 0.6 mu W and DFG conversion efficiency of 4.32x10(-7). The acceptance bandwidth was found to be larger than 0.35 THz (FWHM). As to the 15-mm-long GaSe crystal used in the type-II collinear DFG, a tunable THz source ranging from 0.503 THz to 3.63 THz with the maximum output voltage of 268 mV at 1.65 THz had been achieved, and the corresponding average output power and DFG conversion efficiency were 0.9 mu W and 5.86x10(-7) respectively. This provides a potential practical palm-top tunable THz sources for portable applications.


Files in this item

Thumbnail
Name:
100301Q.pdf
Size:
706.4Kb
Format:
PDF
Description:
Final Published Version

This item appears in the following Collection(s)

Show simple item record