Open AccessFrequency comb investigation of monolithic mode‐locked GaSb‐based laser at 1.7 µm by heterodyne detection
Author(s) -
Becker S.,
Weih R.,
Scheuermann J.,
Rößner K.,
Kistner C.,
Koeth J.,
Höfling S.,
Kamp M.
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2020.1793
Subject(s) - heterodyne (poetry) , laser , heterodyne detection , materials science , optics , frequency comb , wavelength , optoelectronics , physics , acoustics
In this work, monolithic mode‐locked GaSb‐based lasers at 1.7 µm emission wavelength with heterodyne measurement of the frequency comb are presented. Mode‐locking operation was confirmed by measuring the optical beatnote at the round‐trip frequency of 9.56 GHz and analysing the frequency comb. Mode‐locking operation occurred from 0.1 to 3.3 V reverse bias voltages at the absorber section and driving currents from 160 to 400 mA at the laser section with a minimum beatnote width of 6.6 kHz. The frequency comb spans over 13 nm with a mode spacing of 0.10 nm, measured by heterodyne‐detection with a distributed feedback laser.