Patent ID: 9513530
Filing Date: 2016-12-06
CPC Classification: G02B,G02F

Claim Text:
1. 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, 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.