Design of chirped distributed Bragg reflector for octave-spanning frequency group velocity dispersion compensation in terahertz quantum cascade laser | Zendy

Chao Xu | Zendy; Dayan Ban | Zendy

Open Access

Design of chirped distributed Bragg reflector for octave-spanning frequency group velocity dispersion compensation in terahertz quantum cascade laser

Author(s) -

Chao Xu,

Dayan Ban

Publication year - 2016

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.24.013500

Subject(s) - terahertz radiation , optics , group velocity , distributed bragg reflector , octave (electronics) , quantum cascade laser , stopband , cascade , laser , compensation (psychology) , terahertz spectroscopy and technology , materials science , dispersion (optics) , reflector (photography) , fiber bragg grating , group delay and phase delay , distortion (music) , physics , optoelectronics , bandwidth (computing) , telecommunications , band pass filter , computer science , amplifier , light source , chemistry , chromatography , psychology , cmos , psychoanalysis

The strategies and approaches of designing chirped Distributed Bragg Reflector for group velocity compensation in metal-metal waveguide terahertz quantum cascade laser are investigated through 1D and 3D models. The results show the depth of the corrugation periods plays an important role on achieving broad-band group velocity compensation in terahertz range. However, the deep corrugation also brings distortion to the group delay behavior. A two-section chirped DBR is proposed to provide smoother group delay compensation while still maintain the broad frequency range (octave) operation within 2 THz to 4 THz.

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