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Quantum cascade laser based, fiber coupled demultiplexed mid-infrared local oscillator for cryogenic applications
Ren, Yuan1,2; Zhang, DaiXi1,2,3; Wang, Zheng1,2; Zhou, KangMin1,2; Zhong, JiaQiang1,2; Liu, Dong1,2; Miao, Wei1,2; Zhang, Wen1,2; Shi, ShengCai1,2
2020-03-30
Source PublicationAPPLIED PHYSICS LETTERS
ISSN0003-6951
Volume116Issue:13Pages:4
Corresponding AuthorRen, Yuan(yren@pmo.ac.cn) ; Shi, ShengCai(scshi@pmo.ac.cn)
AbstractWe have developed a fiber coupled demultiplexed local oscillator (LO) source for cryogenic applications based on a distributed feedback quantum cascade laser (QCL) at an operating wavelength of 10.6 mu m. The coupling scheme relies on the combination of a phase grating generating multiple LO beams and a polycrystalline fiber delivering the demultiplexed LO signal to a superconducting mixer at 4 K in a closed-cycle cryostat. This scheme eases the use of a beam splitter in front of the mixer. Reflection phase grating generating 2 x 2 beams has been achieved with a total power efficiency of 64% based on a gold covered etched silicon nanostructure. The diffraction beam has been readily coupled into a 2 m long polycrystalline fiber, where a single-lobe circular beam has been delivered at the fiber output. By aligning the fiber core position to the center of a superconducting hot electron bolometer mixer at the rear side, we demonstrate the application of a fiber coupled demultiplexed QCL source for pumping the superconducting mixer with adequate LO power.
DOI10.1063/1.5145131
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
WOS IDWOS:000524548700001
PublisherAMER INST PHYSICS
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/35948
Collection中国科学院紫金山天文台
Corresponding AuthorRen, Yuan; Shi, ShengCai
Affiliation1.Chinese Acad Sci, Purple Mt Observ, 10 YuanHua Rd, Nanjing 210033, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, 10 YuanHua Rd, Nanjing 210033, Peoples R China
3.Univ Sci & Technol China, 96 Jinzhai Rd, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Ren, Yuan,Zhang, DaiXi,Wang, Zheng,et al. Quantum cascade laser based, fiber coupled demultiplexed mid-infrared local oscillator for cryogenic applications[J]. APPLIED PHYSICS LETTERS,2020,116(13):4.
APA Ren, Yuan.,Zhang, DaiXi.,Wang, Zheng.,Zhou, KangMin.,Zhong, JiaQiang.,...&Shi, ShengCai.(2020).Quantum cascade laser based, fiber coupled demultiplexed mid-infrared local oscillator for cryogenic applications.APPLIED PHYSICS LETTERS,116(13),4.
MLA Ren, Yuan,et al."Quantum cascade laser based, fiber coupled demultiplexed mid-infrared local oscillator for cryogenic applications".APPLIED PHYSICS LETTERS 116.13(2020):4.
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