Title :
External-cavity semiconductor laser with focusing grating mirror
Author :
Hori, Yoshikazu ; Asakura, Hiroyukl ; Sogawa, Fumihiro ; Kato, Makoto ; Serizawa, Hiroyuki
Author_Institution :
Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
fDate :
10/1/1990 12:00:00 AM
Abstract :
A novel external-cavity semiconductor laser with a focusing grating mirror (FGM), which enables a single-mode oscillation at a specified wavelength, is proposed. The optical properties of the FGM, which is a computer-generated holographic grating with chirp and bend structure, are numerically analyzed. An optimally designed FGM for realizing laser oscillation at a specific wavelength of 1.30 μm is fabricated by using a computer-controlled electron-beam writing system. The fabricated FGM with grating area of 1×1 mm2 is combined as an external feedback mirror with an InGaAsP-InP semiconductor laser of 1.3 μm wavelength range, and the lasing characteristics are experimentally measured. Stable and single-mode oscillations with spectral line width less than 10 MHz are observed
Keywords :
III-V semiconductors; focusing; gallium arsenide; gallium compounds; holographic gratings; indium compounds; laser cavity resonators; laser modes; lasers; mirrors; semiconductor junction lasers; spectral line breadth; 1 mm; 1.3 micron; InGaAsP-InP; bend structure; chirp structure; computer-controlled electron-beam writing system; computer-generated holographic grating; external feedback mirror; external-cavity semiconductor laser; focusing grating mirror; grating area; laser oscillation; single-mode oscillation; spectral line width; Chirp; Gratings; Holographic optical components; Holography; Laser feedback; Mirrors; Optical computing; Optical design; Optical feedback; Semiconductor lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
