Open AccessCoherence‐selectable operation of external‐cavity semiconductor diode laser by intracavity polarisation control
Author(s) -
Hyodo M.,
Kawakami A.,
Saito S.,
Watanabe M.,
Adachi M.
Publication year - 2015
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.2015.0199
Subject(s) - optics , laser , grating , coherence (philosophical gambling strategy) , semiconductor laser theory , materials science , diode , laser diode , wavelength , distributed feedback laser , optoelectronics , diffraction grating , physics , quantum mechanics
The operation of an external‐cavity semiconductor diode laser with selectable coherence and a tunable wavelength has been successfully demonstrated through the control of the intracavity polarisation state. The laser has an intracavity half‐wave plate that is able to rotate the orientation of the polarisation axis with regard to diffraction grating, where the grating acts as a polarisation‐ and wavelength‐selective element. As a result, it was possible to continuously sweep the correlation widths from 230 kHz to 2.0 MHz by simply rotating the half‐wave plate.