TUNABLE LASER DEVICE AND LASER TRANSMITTER

• Main Authors: ZENG, Li, ZHAO, Jialin, CHEN, Wei
• Format: Patent
• Language: English; French; German
• Published: 08.12.2021
• Subjects: BASIC ELECTRIC ELEMENTS; DEVICES USING STIMULATED EMISSION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; TRANSMISSION

A tunable laser includes a reflective semiconductor optical amplifier SOA, a grating codirectional coupler, and a reflective microring resonator, where the grating codirectional coupler and the reflective microring resonator are both formed on a silicon base; an anti-reflection film is disposed on a first end surface of the reflective SOA, and the first end surface is an end surface, coupled to a first waveguide of the grating codirectional coupler, of the reflective SOA; a second waveguide of the grating codirectional coupler is coupled to the first waveguide, a first grating is disposed on the first waveguide, a second grating disposed opposite to the first grating is disposed on the second waveguide, and the first grating and the second grating constitute a narrow-band pass filter; and the second waveguide is connected to the reflective microring resonator. The tunable laser according to this application has advantages of easier wavelength tuning and a higher wavelength tuning speed.