Narrow Linewidth Asymmetric Coupled Phase-Shift DFB Lasers

Tatsuya KIMURA; Akira SUGIMURA

Narrow Linewidth Asymmetric Coupled Phase-Shift DFB Lasers

Tatsuya KIMURA, Akira SUGIMURA

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As a candidate for a laser structure which reduces spatial hole burning and provides narrower linewidths, we propose a coupled structure of phase shift DFBs with asymmetric cavity lengths. Mode properties of this asymmetric structure are analysed based on the transfer matrix method. It is found that its threshold gain difference between the fundamental mode and the next higher order mode is about 1.9 times larger than that of the conventional single phase-shift DFB structure, when the asymmetry parameter is optimally adjusted. The linewidth calculation taking into account the spatial hole burning effect predicts that, for a linewidth enhancement factor of α4, the minimum feasible linewidth is about 0.1 MHz, which is three times narrower than what can be achieved by the conventional single phase-shift structure.

Publication: IEICE TRANSACTIONS on transactions Vol.E73-E No.1 pp.71-76

Publication Date: 1990/01/25

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Type of Manuscript: Special Section PAPER (Special Issue on International Conference on Integrated Optics and Optical Fiber Communication)

Category: Optical Semiconductor Devices and OEICs

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Tatsuya KIMURA
Akira SUGIMURA

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Tatsuya KIMURA, Akira SUGIMURA, "Narrow Linewidth Asymmetric Coupled Phase-Shift DFB Lasers" in IEICE TRANSACTIONS on transactions, vol. E73-E, no. 1, pp. 71-76, January 1990, doi: .
Abstract: As a candidate for a laser structure which reduces spatial hole burning and provides narrower linewidths, we propose a coupled structure of phase shift DFBs with asymmetric cavity lengths. Mode properties of this asymmetric structure are analysed based on the transfer matrix method. It is found that its threshold gain difference between the fundamental mode and the next higher order mode is about 1.9 times larger than that of the conventional single phase-shift DFB structure, when the asymmetry parameter is optimally adjusted. The linewidth calculation taking into account the spatial hole burning effect predicts that, for a linewidth enhancement factor of α4, the minimum feasible linewidth is about 0.1 MHz, which is three times narrower than what can be achieved by the conventional single phase-shift structure.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e73-e_1_71/_p

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@ARTICLE{e73-e_1_71,
author={Tatsuya KIMURA, Akira SUGIMURA, },
journal={IEICE TRANSACTIONS on transactions},
title={Narrow Linewidth Asymmetric Coupled Phase-Shift DFB Lasers},
year={1990},
volume={E73-E},
number={1},
pages={71-76},
abstract={As a candidate for a laser structure which reduces spatial hole burning and provides narrower linewidths, we propose a coupled structure of phase shift DFBs with asymmetric cavity lengths. Mode properties of this asymmetric structure are analysed based on the transfer matrix method. It is found that its threshold gain difference between the fundamental mode and the next higher order mode is about 1.9 times larger than that of the conventional single phase-shift DFB structure, when the asymmetry parameter is optimally adjusted. The linewidth calculation taking into account the spatial hole burning effect predicts that, for a linewidth enhancement factor of α4, the minimum feasible linewidth is about 0.1 MHz, which is three times narrower than what can be achieved by the conventional single phase-shift structure.},
keywords={},
doi={},
ISSN={},
month={January},}

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TY - JOUR
TI - Narrow Linewidth Asymmetric Coupled Phase-Shift DFB Lasers
T2 - IEICE TRANSACTIONS on transactions
SP - 71
EP - 76
AU - Tatsuya KIMURA
AU - Akira SUGIMURA
PY - 1990
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E73-E
IS - 1
JA - IEICE TRANSACTIONS on transactions
Y1 - January 1990
AB - As a candidate for a laser structure which reduces spatial hole burning and provides narrower linewidths, we propose a coupled structure of phase shift DFBs with asymmetric cavity lengths. Mode properties of this asymmetric structure are analysed based on the transfer matrix method. It is found that its threshold gain difference between the fundamental mode and the next higher order mode is about 1.9 times larger than that of the conventional single phase-shift DFB structure, when the asymmetry parameter is optimally adjusted. The linewidth calculation taking into account the spatial hole burning effect predicts that, for a linewidth enhancement factor of α4, the minimum feasible linewidth is about 0.1 MHz, which is three times narrower than what can be achieved by the conventional single phase-shift structure.
ER -