Back to results
US 2014/0193113 A1Published application
Optical semiconductor element, method of controlling the same and method of manufacturing the same
AssigneeFujitsu Limited
InventorTomoyuki Akiyama
Life of this patent
Estimating the term…
Abstract
An optical semiconductor element includes a ring modulator, and a light absorbing material provided at a position apart from a path for a modulated light which is guided by the ring modulator, the light absorbing material absorbing a light leaked out of a ring waveguide of the ring modulator, and increasing a temperature of the ring waveguide.
Claims18
An optical semiconductor element, comprising:
- a ring modulator;
- and
- a light absorbing material provided at a position apart from a path for a modulated light which is guided by the ring modulator, the light absorbing material absorbing a light leaked out of a ring waveguide of the ring modulator, and increasing a temperature of the ring waveguide.
An optical semiconductor element, comprising:
- ring modulators whose circumferential optical path lengths are different from one another;
- and
- light absorbing materials, each of the light absorbing materials provided at a position apart from a path for a modulated light which guided by each of the ring modulators, absorbing a light leaked out of a ring waveguide of each of the ring modulators, and increasing a temperature of the ring waveguide.
A method of controlling an optical semiconductor element, the method comprising:
- heating an optical semiconductor element to a particular temperature or more with a heater, the optical semiconductor element including:
- a ring modulator;
- and
- a light absorbing material provided at a position apart from a path for a modulated light which is guided by the ring modulator, the light absorbing material absorbing a light leaked out of a ring waveguide of the ring modulator, and increasing a temperature of the ring waveguide;
- starting incidence of a modulated light to the ring modulator;
- and
- after the starting, stopping the heating with the heater,
- wherein
- a heating value in a first relationship is larger than a heating value in a second relationship at a ring resonant wavelength giving a maximum to the first relationship, the first relationship being a relationship between a ring resonant wavelength and a heating value according to absorption of a resonance light in the ring waveguide, and the second relationship being a relationship between a heating value and a ring resonant wavelength which changes according to the heating value in the ring waveguide, and
- the particular temperature is a temperature corresponding to a nearest intersection on a short wavelength side from the ring resonant wavelength giving the maximum to the first relationship among intersections between a graphic chart representing the first relationship and a graphic chart representing the second relationship.
7 more elements
A method of manufacturing an optical semiconductor element, the method comprising:
- forming a ring modulator;
- and
- forming a light, absorbing material at a position apart from a path for a modulated light which is guided by the ring modulator, the light absorbing material absorbing a light leaked out of a ring waveguide of the ring modulator, and increasing a temperature of the ring waveguide.
Dependencies are inferred from the claim text.