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:
Apr. 20, 2010
Filed:
Jul. 26, 2007
Toshio Higashi, Yamanashi, JP;
Yasuyuki Yamauchi, Yamanashi, JP;
Emmanuel Le Taillandier DE Gabory, Kanagawa, JP;
Hirokazu Tanaka, Yamanashi, JP;
Junji Watanabe, Yamanashi, JP;
Toshio Higashi, Yamanashi, JP;
Yasuyuki Yamauchi, Yamanashi, JP;
Emmanuel le Taillandier de Gabory, Kanagawa, JP;
Hirokazu Tanaka, Yamanashi, JP;
Junji Watanabe, Yamanashi, JP;
Eudyna Devices Inc., Yamanashi, JP;
Abstract
A laser module has an optical amplifier, a first etalon and a wavelength selectable mirror. The first etalon has wavelength peaks at a given wavelength interval in transmission characteristics and transmits a light from the optical amplifier. The wavelength peaks are tunable. The wavelength selectable mirror acts as an external mirror of an external cavity laser including the optical amplifier, and has a relatively high reflection intensity at a part of wavelength range in an effective gain range of the optical amplifier. The effective gain range of the optical amplifier includes more than one wavelength peak of the first etalon. A reflection bandwidth where the wavelength selectable mirror has a relatively high reflection intensity is less than twice of the wavelength interval of the wavelength peaks of the first etalon.