Tunable laser, optical module, and control method thereof

Details Tunable laser, optical module, and control method thereof Tunable laser, optical module, and control method thereof

2006-03-01

2009-12-29

Tran, Minh-Loan T (Department: 2826)

Coherent light generators

Particular resonant cavity

Folded cavity

C372S020000, C372S026000, C372S029010, C372S036000, C372S050210, C372S093000, C372S066000, C372S068000, C372S700000

Reexamination Certificate

active

07639723

ABSTRACT:
A tunable laser is provided, including: a multiple ring resonator that is formed by coupling ring resonant elements having different optical path length from each other; an input/output-side waveguide connected to one of the ring resonant elements; a reflection-side wave guide connected to another one of the ring resonant elements; a PLC substrate on which the multiple ring resonator, the input/output side waveguide, and the reflection-side waveguide are formed; a high reflection film provided to the reflection-side waveguide; an SOA connected to the input/output-side waveguide; film heaters and a phase control region of the SOA for changing the resonant wavelength of the multiple ring resonator; and a light-receiving element for detecting the resonant wavelength of the multiple ring resonator in a thru port of a directional coupler.

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