Open AccessStabilized all-fiber source for generation of tunable broadband fCEO-free mid-IR frequency comb in the 7 – 9 µm range
Author(s) -
Karol Krzempek,
Dorota Tomaszewska,
Aleksander Głuszek,
Tadeusz Martynkien,
Paweł Mergo,
Jarosław Sotor,
Aleksandra Foltynowicz,
Grzegorz Soboń
Publication year - 2019
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.27.037435
Subject(s) - optics , materials science , broadband , fiber laser , laser , radiation , frequency comb , optical fiber , spectroscopy , optoelectronics , physics , quantum mechanics
A compact and robust all-fiber difference frequency generation-based source of broadband mid-infrared radiation is presented. The source emits tunable radiation in the range between 6.5 µm and 9 µm with an average output power up to 5 mW at 125 MHz repetition frequency. The all-in-fiber construction of the source along with active stabilization techniques results in long-term repetition rate stability of 3 Hz per 10 h and a standard deviation of the output power better than 0.8% per 1 h. The applicability of the presented source to laser spectroscopy is demonstrated by measuring the absorption spectrum of nitrous oxide (N 2 O) around 7.8 µm. The robustness and good long- and short-term stability of the source opens up for applications outside the laboratory.