Title :
Polarization-controlled single-mode VCSEL
Author :
Yoshikawa, Takashi ; Kawakami, Takeshi ; Saito, Hideaki ; Kosaka, Hideo ; Kajita, Mikiyasu ; Kurihara, Kaori ; Sugimoto, Yoshimasa ; Kasahara, Kenichi
Author_Institution :
Optoelectron. & High Frequency Device Res. Labs., NEC Corp., Ibaraki, Japan
fDate :
6/1/1998 12:00:00 AM
Abstract :
Relative intensity noise (RIN) in a vertical-cavity surface-emitting laser (VCSEL) was greatly reduced through the use of polarization control to eliminate competition between two orthogonal polarization states by ensuring there was only one polarization state. Polarization was stable with optical feedback of up to 10%. Polarization control was achieved by inducing a small loss anisotropy in fundamental transversal mode VCSEL´s. Anisotropic post structures, such as a rectangular post, an oblique post, or a zigzag-sidewall post, were found to be effective in creating loss anisotropy without serious degradation of other VCSEL characteristics such as light-output power or beam profile
Keywords :
laser cavity resonators; laser feedback; laser modes; laser noise; laser stability; light polarisation; semiconductor lasers; surface emitting lasers; anisotropic post structures; beam profile; fundamental transversal mode VCSEL; light-output power; oblique post; optical feedback; orthogonal polarization states; polarization control; polarization state; polarization-controlled single-mode VCSEL; rectangular post; relative intensity noise; small loss anisotropy; vertical-cavity surface-emitting laser; zigzag-sidewall post; Anisotropic magnetoresistance; Laser feedback; Laser modes; Laser noise; Noise reduction; Optical losses; Optical noise; Optical polarization; Surface emitting lasers; Vertical cavity surface emitting lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
