The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 1998
Filed:
Nov. 09, 1995
Rikagaku Kenkyusho, Saitama, JP;
Abstract
In order to eliminate a mechanically movable section, such as a rotation mechanism of a diffraction grating, to achieve a compact fabrication of the whole apparatus, and to realize stable action for selecting a wavelength, a laser oscillator selecting a wavelength in a wavelength-tunable laser is composed of a laser resonator consisting of a mirror on the input side and a mirror on the output side; a laser medium which is placed in the laser resonator and can oscillate in a predetermined range of wavelengths; a crystal to which is piezoelectric element is attached, the crystal receiving acoustic waves from the piezoelectric element in accordance with a desired wavelength; and a polarizing plate which is placed in the laser resonator and transmits only the output light beam having a prescribed plane of polarization or having a prescribed direction of light propagation among the output light beams from the laser medium. The apparatus thereby outputs only the desired wavelength.