Invention Grant
- Patent Title: Surface emitting laser element and atomic oscillator
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Application No.: US15216834Application Date: 2016-07-22
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Publication No.: US10170887B2Publication Date: 2019-01-01
- Inventor: Ryoichiro Suzuki
- Applicant: Ryoichiro Suzuki
- Applicant Address: JP Tokyo
- Assignee: RICOH COMPANY, LTD.
- Current Assignee: RICOH COMPANY, LTD.
- Current Assignee Address: JP Tokyo
- Agency: Cooper & Dunham LLP
- Priority: JP2015-155956 20150806
- Main IPC: H01S5/068
- IPC: H01S5/068 ; H01S5/00 ; H01S5/187 ; H03L7/26 ; H01S5/183 ; H01S5/20 ; H01S5/343

Abstract:
A surface emitting laser element includes a lower Bragg reflection mirror; an upper Bragg reflection mirror; and a resonator region formed between the lower Bragg reflection mirror and the upper Bragg reflection mirror, and including an active layer. A wavelength adjustment region is formed in the lower Bragg reflection mirror or the upper Bragg reflection mirror, and includes a second phase adjustment layer, a wavelength adjustment layer and a first phase adjustment layer, arranged in this order from a side where the resonator region is formed. An optical thickness of the wavelength adjustment region is approximately (2N+1)×λ/4, and the wavelength adjustment layer is formed at a position where an optical distance from an end of the wavelength adjustment region on the side of the resonator region is approximately M×λ/2, where λ is a wavelength of emitted light, M and N are positive integers, and M is N or less.
Public/Granted literature
- US20170040771A1 SURFACE EMITTING LASER ELEMENT AND ATOMIC OSCILLATOR Public/Granted day:2017-02-09
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