Patent EP0468826B1 successfully refreshed from Google Patents.
EP0468826B1
Expired / Lapsed
EP
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Optical pulse generating apparatus
Assignee: Pioneer Corp
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Filing: 1991-07-29
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Granted: 1994-03-16
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Expires: 2011-07-29
Abstract
No abstract record available.
Inventors
- 👤 Kiichiro Shinokura
- 👤 Hitoshi Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 05:14
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/06; H01S5/065; H01S5/10; H01S5/14; H01S5/146; H01S5/0657
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
An optical pulse generating apparatus comprising a semiconductor laser medium (1), including a semiconductor element, and an external resonator for oscillating the semiconductor laser medium (1), in mode locking with a frequency of an injected current, to generate optical pulses; wherein said external resonator comprises an optical waveguide path (2) including a reflecting element (3) for reflecting part of a laser beam emitted from the semiconductor laser medium (1); said reflecting element (3) having a reflection wavelength characteristic wherein a center wavelength in a high-reflectivity wavelength range falls within a gain wavelength range of the semiconductor laser medium (1) and a half power width of said characteristic is equal to or lower than twice an interval between longitudinal modes dependent on the length of the semiconductor laser element (1).
Claim 2
Dependent Claim
34 words
An optical pulse generating apparatus according to Claim 1, wherein the reflecting wavelength has a characteristic such that reflectivity is highest at a center wavelength of the spectrum in the oscillation main longitudinal mode.
Claim 3
Dependent Claim
37 words
An optical pulse generating apparatus according to Claim 1 or 2, wherein the reflecting wavelength has a characteristic such that it is narrower so as to include only a spectrum width of the oscillation main longitudinal mode.
Claim 4
Dependent Claim
25 words
An optical pulse generating apparatus according to any of Claims 1 to 3, wherein the optical waveguide path is formed by an optical fiber (2).
References Cited (Backward Citations)
No citation records indexed.
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