Title:
V-BRANCH OPTICAL WAVEGUIDE AND OPTICAL INTEGRATED CIRCUIT
Document Type and Number:
Japanese Patent JP3841969
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a small radiation loss and a stable branching ratio by providing an input waveguide which inputs light, two output waveguides which output light, and a multimode waveguide which is arranged between the input waveguide and two output waveguides and generate mode light.
SOLUTION: The multimode waveguide (II) of a length L is arranged between the input waveguide (I) of a width (w) and the two output waveguides (III) having a width (w) and an initial waveguide interval (d). To make the multimode waveguide (II) asymmetrical, a part of the core at the input end of the multimode waveguide (II) is made small by δ and the distance between the core flank and center line is put back gradually in the travel direction of light according to a function a(z). Consequently, the phase speed of the light propagated in the multimode waveguide (II) becomes asymmetrical about the center line. Consequently, the peaks of a two-peak light intensity distribution appearing owing to mode interference has a difference in height to actualize the asymmetry of the branching ratio.
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Inventors:
Well standing
Application Number:
JP4413799A
Publication Date:
November 08, 2006
Filing Date:
February 23, 1999
Export Citation:
Assignee:
Japan Opnext Co., Ltd.
International Classes:
G02B6/122; G02B6/28; (IPC1-7): G02B6/122; G02B6/28
Domestic Patent References:
| JP9033740A | ||||
| JP9015436A |
Attorney, Agent or Firm:
Nitto International Patent Office