Simulation and Examination for Beam Profile of DFB Laser with an Anti-reflection Coated Mirror (무반사 면을 갖는 DFB 레이저의 빔 분포 시뮬레이션과 검정)

Kwon Kee Young (권기영); Ki Jang Geun (기장근)

doi:10.29056/jsav.2020.06.07

Simulation and Examination for Beam Profile of DFB Laser with an Anti-reflection Coated Mirror

Journal of Software Assessment and Valuation
Abbr : JSAV
2020, 16(1), pp.55-63
DOI : 10.29056/jsav.2020.06.07
Publisher : Korea Software Assessment and Valuation Society
Research Area : Engineering > Computer Science
Received : May 17, 2020
Accepted : June 19, 2020
Published : June 30, 2020

Kwon Kee Young ¹, Ki Jang Geun ¹

¹공주대학교

Candidate

ABSTRACT

Lasers for optical broadband communication systems should have excellent frequency selectivity and modal stability. DFB lasers have low lasing frequency shift during high speed current modulation. In this paper, when a refractive index grating and a gain grating are simultaneously present in a DFB laser having a wavelength of 1.55 μm, the dielectric film is coated so that reflection does not occur on the right mirror surface, so that  =0. For the first mode, which requires a minimum gain at the threshold, the beam distribution of the oscillation mode in the longitudinal direction and the radiated power ratio were analyzed and compared for the cases of the phase of = and  . If the phase of = , in order to obtain a low threshold current and high frequency stability,  should be greater than 8. In the case of the phase of =, for low threshold current,  is necessary to be 1.0, where the oscillation frequency coincides with the lattice frequency. DFB lasers with an anti-reflection coated mirror have excellent mode selectivity than 1.55um DFB lasers with two mirror facets.

KEYWORDS

DFB laser, beam profile, grating phase, index grating, gain grating

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[journal] 권기영 / 2019 / Simulation and Examination for Beam Profile of DFB Laser / 한국소프트웨어감정평가학회 논문지 / 한국소프트웨어감정평가학회 15(1) : 71~78

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Journal of Software Assessment and Valuation 2023 KCI Impact Factor : 0.35

Simulation and Examination for Beam Profile of DFB Laser with an Anti-reflection Coated Mirror

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* References for papers published after 2023 are currently being built.

Journal of Software Assessment and Valuation 2023 KCI Impact Factor : 0.35

Simulation and Examination for Beam Profile of DFB Laser with an Anti-reflection Coated Mirror

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