Title:
EXTERNAL CAVITY DIODE LASER
Document Type and Number:
Japanese Patent JPH05206578
Kind Code:
A
Abstract:
PURPOSE: To provide such a laser structure as to form an annular beam focused in a small spot size and thereby increase the maximum focused intensity. CONSTITUTION: This external cavity diode laser comprises a diode laser 5, a quantum-well strip 10 extending between a first plane 35 of the diode layer 5 and a second plane 25 parallel thereto and appearing on a second plane, and a focusing means 55 made of a cylindrical lens. In the external cavity diode laser, the focusing means 55 is positioned in proximity to the second plane 25, so that the dispersion of light along the Y-axis is caught, and the longitudinal axis of the cylindrical lens is parallel with a Z-axis. In the external cavity diode laser, the major surface of the focusing means 55 is on a plane formed by the Z-axis and the Y-axis and positioned at a distance of approx. dc from the second plane 25, and light beams radiated from a light radiation region have an almost annular cross section.
Inventors:
TEODOA SAIZAA SEKANDO
Application Number:
JP29398792A
Publication Date:
August 13, 1993
Filing Date:
October 08, 1992
Export Citation:
Assignee:
AMERICAN TELEPHONE & TELEGRAPH
International Classes:
G02B6/42; H01S5/00; H01S5/026; H01S5/14; H01S3/00; (IPC1-7): H01S3/18
Domestic Patent References:
| JPS61258487A | 1986-11-15 | |||
| JPS52131969U | 1977-10-06 | |||
| JPH02216881A | 1990-08-29 | |||
| JPS5545239U | 1980-03-25 | |||
| JPS5645091A | 1981-04-24 | |||
| JPS60258993A | 1985-12-20 |
Attorney, Agent or Firm:
Hirofumi Mimata
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