NDLI: Generation and Detection of THz Pulses With a Bandwidth Extending Beyond 4 THz Using a Subpicosecond Yb-Doped Fiber Laser System

Content Provider	IEEE Xplore Digital Library
Author	Nagai, M. Matsubara, E. Ashida, M. Takayanagi, J. Ohtake, H.
Copyright Year	2011
Abstract	We experimentally demonstrate the generation and detection of broadband THz pulses with a bandwidth extending beyond 4 THz by using a 1.04- μm Yb-doped fiber laser with a pulse duration of 0.48 ps. Owing to higher order nonlinear processes (such as the cascaded χ⁽²⁾ process and χ⁽³⁾ process) in LiNbO₃ crystals, THz pulses can be emitted efficiently with a bandwidth extending beyond the boundaries of the spectral width of the excitation pulse. By compressing divided sampling pulses to as short as 80 fs, we detected the THz pulse in the full spectral range, which could not be resolved with the original pulse. The precise control of the nonlinear effects and the compression of the sampling pulses compensated for the disadvantage of using a 1- μm fiber laser. This work will contribute to the progress of nonlinear THz spectroscopy.
Starting Page	440
Ending Page	446
Page Count	7
File Size	1098513
File Format	PDF
ISSN	2156342X
Volume Number	4
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Crystals Bandwidth Laser excitation Optical pulse compression Optical refraction Optical sensors Optical variables control terahertz (THz) Electro-optic effect fiber laser nonlinear optics nonlinear equation optical pulse
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Radiation

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