| 摘要 |
<p>Disclosed is a reflective thermo-optic variable optical attenuator, comprising an input waveguide (1), an output waveguide (2), an input access waveguide (3), an output access waveguide (4), a 2*2 coupler coupling area (5), a first transmission access waveguide (6), a second transmission access waveguide (7), a first transmission waveguide (8), a second transmission waveguide (9), a first reflector access waveguide (10), a second reflector access waveguide (11), a first reflector (12), a second reflector (13), a micro-heating electrode heating metal area (14) and a micro-heating electrode contact metal area (15). Light input by the input waveguide (1) is split into two beams of light with equal power and a phase difference of 90 degrees through the 2*2 coupler coupling area (5), and the split light is output to the first and second transmission waveguides (8, 9); the first transmission waveguide (8) is heated by the micro-heating electrode heating metal area (14); the split light is reflected back to the 2*2 coupler coupling area (5) for combination through the first and second reflectors (12, 13); the combined light is output through the output waveguide (3). The reflective thermo-optic variable optical attenuator uses the waveguide reflectors as reflecting units, and features compact structure, simple and convenient manufacturing method, and low power consumption.</p> |
