Title:
LIGHT MONITORING MECHANISM, EXTERNAL-RESONATOR-TYPE LASER LIGHT SOURCE, TUNABLE-WAVELENGTH LASER DEVICE, AND OPTICAL WAVEGUIDE FILTER
Document Type and Number:
WIPO Patent Application WO/2017/183411
Kind Code:
A1
Abstract:
As a light monitoring mechanism for monitoring light in an optical circuit (10) including a folded loop mirror (12) having a folded loop shape, to which an optical waveguide (11) having a linear shape is connected, the light monitoring mechanism has a structure in which a tap port (15) having a folded shape or a loop shape is disposed in proximity to a position on the folded loop mirror (12) at which the optical lengths from the node between the folded loop mirror (12) and the optical waveguide (11) in the case where the light travels in the clockwise direction and in the case where the light travels in the counterclockwise direction coincide with each other, which makes it possible to extract a portion of the light from the folded loop mirror (12) to the tap port (15) as light for monitoring without causing optical loss. This provides a light monitoring mechanism having a structure in which the occurrence of optical loss is minimized in the case where light for monitoring is extracted.
Inventors:
KOBAYASHI NAOKI (JP)
Application Number:
PCT/JP2017/013245
Publication Date:
October 26, 2017
Filing Date:
March 30, 2017
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G02B6/12; G02B6/125; H01S5/14
Domestic Patent References:
| WO2009119284A1 | 2009-10-01 |
Foreign References:
| JP2010177539A | 2010-08-12 | |||
| JP2004101936A | 2004-04-02 | |||
| JP2008002954A | 2008-01-10 | |||
| JP2016102926A | 2016-06-02 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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