WAVELENGTH TUNABLE LASER DIODE USING DOUBLE COUPLED RING RESONATOR
First Claim
1. A wavelength tunable laser diode using a double coupled ring resonator comprising:
- first and second passive waveguides connected to both terminals of a first optical amplifier;
a third passive waveguide arranged in parallel with the first and second passive waveguides;
a double coupled ring resonator including first and second ring resonators connected to each other and having different radii, the double coupled ring resonator being coupled between the first and second passive waveguides and the third passive waveguide; and
first and second electrodes for applying current or voltage to the first and second ring resonators, respectively.
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Abstract
A wavelength tunable laser diode using a double coupled ring resonator is provided. A new double coupled ring resonator structure is formed by a connection of two ring resonators having different radii so that stable laser oscillation occurs only in a resonant wavelength at which the two ring resonators are simultaneously resonated, and the effective refractive index of the two ring resonators is properly controlled differently for tunable laser oscillation wavelengths. The reproducibility of the optical coupling characteristics of the passive waveguides and the ring resonator can be assured by multi-mode couplers. This results in improved manufacturing productivity of the wavelength tunable laser diode. It is possible to amplify and output an output light without having an effect on oscillation wavelength characteristic by means of an optical amplifier integrated in an output end.
27 Citations
8 Claims
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1. A wavelength tunable laser diode using a double coupled ring resonator comprising:
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first and second passive waveguides connected to both terminals of a first optical amplifier; a third passive waveguide arranged in parallel with the first and second passive waveguides; a double coupled ring resonator including first and second ring resonators connected to each other and having different radii, the double coupled ring resonator being coupled between the first and second passive waveguides and the third passive waveguide; and first and second electrodes for applying current or voltage to the first and second ring resonators, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification