Athermal external cavity laser
First Claim
1. An athermal external cavity laser (ECL) comprising:
- a semiconductor amplifier;
an optical fiber comprising a core in which a Bragg grating is formed and a cladding surrounding the core; and
a thermosetting polymer that fixes the optical fiber to a ferrule and has a negative thermooptical coefficient,wherein the thickness of the cladding surrounding the core in which the Bragg grating is formed is smaller than that of the cladding surrounding region of the core in which the Bragg grating is not formed, and the thermosetting polymer surrounds the cladding.
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Accused Products
Abstract
Provided is an athermal external cavity laser (ECL), whose output optical power and output wavelength can be kept regular irrespective of temperature changes without using additional temperature controlling components. The ECL comprises: a semiconductor amplifier; an optical fiber comprising a core in which a Bragg grating is formed and a cladding surrounding the core; and a thermosetting polymer that fixes the optical fiber to a ferrule and has a negative thermooptical coefficient, wherein the thickness of the cladding surrounding the core in which the Bragg grating is formed is smaller than the portion of the cladding surrounding the portion of the core where the Bragg grating is not formed, and the thermosetting polymer the negative thermooptical coefficient surrounds the cladding. The ECL does not need additional temperature controlling components and thus can be manufactured compact and at low cost, and thus can be used as a light source of a dense wavelength division multiplexing (DWDM) system in designing economical WDM passive optical networks (PON).
12 Citations
12 Claims
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1. An athermal external cavity laser (ECL) comprising:
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a semiconductor amplifier; an optical fiber comprising a core in which a Bragg grating is formed and a cladding surrounding the core; and a thermosetting polymer that fixes the optical fiber to a ferrule and has a negative thermooptical coefficient, wherein the thickness of the cladding surrounding the core in which the Bragg grating is formed is smaller than that of the cladding surrounding region of the core in which the Bragg grating is not formed, and the thermosetting polymer surrounds the cladding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification