Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy | Zendy

Clara Quevedo-Galán | Zendy; Vicente Durán | Zendy; Alejandro Rosado | Zendy; Antonio Pérez Serrano | Zendy; J. M. G. Tijero | Zendy; I. Esquivias | Zendy

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Gain-switched semiconductor lasers with pulsed excitation and optical injection for dual-comb spectroscopy

Author(s) -

Clara Quevedo-Galán,

Vicente Durán,

Alejandro Rosado,

Antonio Pérez Serrano,

J. M. G. Tijero,

I. Esquivias

Publication year - 2020

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.404398

Subject(s) - optics , materials science , semiconductor laser theory , laser , spectroscopy , optoelectronics , semiconductor , semiconductor optical gain , amplified spontaneous emission , physics , quantum mechanics

In this work we demonstrate the capability of two gain-switched optically injected semiconductor lasers to perform high-resolution dual-comb spectroscopy. The use of low duty cycle pulse trains to gain switch the lasers, combined with optical injection, allows us to obtain flat-topped optical frequency combs with 350 optical lines (within 10 dB) spaced by 100 MHz. These frequency combs significantly improve the spectral resolution reported so far on dual-comb spectroscopy with gain-switched laser diodes. We evaluate the performance of our system by measuring the transmission profile of an absorption line of H 13 CN at the C-band, analyzing the attainable signal-to-noise ratio for a range of averaging times.

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