Nonlinear optics in germanium mid-infrared fiber material: Detuning oscillations in femtosecond mid-infrared spectroscopy

M. Ordu; J. Guo; G. Ng Pack; P. Shah; S. Ramachandran; M. K. Hong; L. D. Ziegler; S. N. Basu; S. Erramilli

doi:10.1063/1.5003027

journal article·2017-09-01Open access

Nonlinear optics in germanium mid-infrared fiber material: Detuning oscillations in femtosecond mid-infrared spectroscopy

M. Ordu, J. Guo, G. Ng Pack, P. Shah, S. Ramachandran, M. K. Hong, L. D. Ziegler, S. N. Basu, S. Erramilli

AIP Advances· Volume 7· Issue 9

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Source abstract

Abstract

Germanium optical fibers hold great promise in extending semiconductor photonics into the fundamentally important mid-infrared region of the electromagnetic spectrum. The demonstration of nonlinear response in fabricated Ge fiber samples is a key step in the development of mid-infrared fiber materials. Here we report the observation of detuning oscillations in a germanium fiber in the mid-infrared region using femtosecond dispersed pump-probe spectroscopy. Detuning oscillations are observed in the frequency-resolved response when mid-infrared pump and probe pulses are overlapped in a fiber segment. The oscillations arise from the nonlinear frequency resolved nonlinear (χ(3)) response in the germanium semiconductor. Our work represents the first observation of coherent oscillations in the emerging field of germanium mid-infrared fiber optics.

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Research context

Electronic materials

OpenAlex topics: Photonic and Optical Devices · Advanced Fiber Laser Technologies · Optical Network Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Mechanical Engineering, Boston University 1 , Boston, Massachusetts 02215, USA

Division of Materials Science and Engineering, Boston University 2 , Brookline, Massachusetts 02446, USA

Department of Chemistry, Boston University 3 , Boston, Massachusetts 02215, USA

Department of Electrical and Computer Engineering, Boston University 4 , Boston, Massachusetts 02215, USA

Photonics Center, Boston University 5 , Boston, Massachusetts 02215, USA

Department of Physics, Boston University 6 , Boston, Massachusetts 02215, USA

Department of Biomedical Engineering, Boston University 7 , Boston, Massachusetts 02215, USA

Funding

National Science Foundation

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