[특허]Article comprising a wavelength-stabilized semiconductor laser

Article comprising a wavelength-stabilized semiconductor laser 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01S-003/137 H01S-003/10 H01S-003/133
출원번호	US-0028881 (1993-03-10)
발명자 / 주소	Koch Thomas L. (Holmdel NJ) Woodward Sheryl L. (Lincroft NJ)
출원인 / 주소	AT&T Bell Laboratories (Murray Hill NJ 02)
인용정보	피인용 횟수 : 74 인용 특허 : 0

초록 ▼

The disclosed article comprises a semiconductor laser (typically a multi-segment DBR laser) and feedback means for controlling the laser wavelength. The wavelength reference element in the feedback means advantageously is an optical fiber comprising an in-line refractive index grating. Such gratings frequently have a transmission spectrum that exhibits subsidiary lobes, in addition to the desired main lobe, potentially compromising the “cold-start”ability of prior art systems. This and other drawbacks of prior art systems exemplarily are overcome by apparatus that comprises a feedback loop that comprises means for causing a current IB to flow to the “Bragg”section of a multi-segment DBR laser such that wavelength of the laser output is a function of IB, and that further comprises means for changing the temperature of the laser in response to a change in the wavelength of the laser. Use of a wavelength reference element that has a relatively wide primary minimum facilitates cold starting. Exemplarily, the disclosed article is a wavelength division multiplexed (WDM) optical fiber communication system.

대표청구항 ▼

An article comprising a) a semiconductor laser and means for causing a first electrical current to flow through the laser such that the laser has a radiation output; b) means for changing the wavelength of said radiation output; c) first optical waveguide means adapted for receiving said radiation output; and d) means, connected to the means of b), for maintaining the wavelength of said radiation output substantially equal to a desired wavelength, said means comprising second optical waveguide means that comprise an in-line optical waveguide grating and are connected to said first optical waveguide means such that a portion of said received radiation output is coupled into the second optical waveguide means; CHARACTERIZED IN THAT e) the means of b) comprise means for causing a second electrical current to flow through the laser such that the wavelength of the radiation output is a function of the second current, and further comprise means for changing the temperature of the laser, in response to a change in the wavelength of the laser.

이 특허를 인용한 특허 (74)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Article comprising a wavelength-stabilized semiconductor laser 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (74)

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연합인증

Article comprising a wavelength-stabilized semiconductor laser 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (74)

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