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Patent Searching and Data


Title:
EXTERNAL RESONATOR TYPE LIGHT EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/107960
Kind Code:
A1
Abstract:
A semiconductor laser light source (2) is equipped with an active layer (5) for emitting semiconductor laser light. A grating element comprises: a ridge-type optical waveguide (18) having an incident surface (11a) on which the semiconductor laser light is incident and an exit surface (11b) from which exit light having a desired wavelength goes out; a Bragg grating (12) consisting of recesses and protrusions formed in the ridge-type optical waveguide (18); an exit-side propagation portion (20) provided between the Bragg grating (12) and the exit surface (11b). A laser oscillation occurs in the region of wavelengths reflected by the Bragg grating. The optical waveguide width (Wm) at the Bragg grating (12) is different from the optical waveguide width (Wout) at the exit surface.

Inventors:
KONDO JUNGO (JP)
YAMAGUCHI SHOICHIRO (JP)
YOSHINO TAKASHI (JP)
TAKEUCHI YUKIHISA (JP)
Application Number:
JP2015/050279
Publication Date:
July 23, 2015
Filing Date:
January 07, 2015
Export Citation:
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Assignee:
NGK INSULATORS LTD (JP)
International Classes:
H01S5/14; G02B6/12; G02B6/122; G02B6/42
Domestic Patent References:
WO2005099054A12005-10-20
Foreign References:
US20020110328A12002-08-15
JP2002031730A2002-01-31
JPH0774396A1995-03-17
JP3667209B22005-07-06
JPH02154476A1990-06-13
JPH1098230A1998-04-14
JPH11163470A1999-06-18
Attorney, Agent or Firm:
HOSODA Masutoshi et al. (JP)
Masunori Hosoda (JP)
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