Patent ID: 9684223
Date: 2017-06-20
CPC Classifications: G02F,H01S

Claim:
1. An optical apparatus comprising: an optical source that generates a first pulse with a first optical wavelength; an optical amplifier that amplifies the first pulse and outputs an amplified pulse with the first optical wavelength; a first waveguide that is connected to the optical amplifier which receives the amplified pulse; a second waveguide that is connected to the first waveguide and receives the amplified pulse, wherein the second waveguide converts the energy of the amplified pulse into energy of a second pulse while a relative center position of the second pulse for the amplified pulse is crossing a center position of the amplified pulse in a first direction, wherein the second pulse has a second optical wavelength different from the first optical wavelength; wherein the amplifier, the first waveguide, and the second waveguide form an optical loop which feeds the second pulse back to the amplifier, the first waveguide, and the second waveguide; an output coupler to output a portion of the second pulse outside of the optical loop; wherein the following equation is satisfied: in which a length of the first waveguide is L, a nonlinear coefficient of the first waveguide is γ, a peak power of the amplified pulse as it is received by the first waveguide is P, and a minimum length of the first waveguide is L