| 主权项 |
1. A semiconductor optical amplifier (SOA) which is monolithically integrated with a Mach-Zehnder modulator, characterized in, that one or more input access waveguides (1) are connected to an optical splitter (2), such as a Y-branch type, a directional coupler, or a 1×N or N×N Multi-Mode-Interference MMI, that is arranged to divide the light into two or more output waveguides, in that at least two of the splitter's output access waveguides (3,4) are used to form a Mach-Zehnder interferometer modulator where at least one arm of the interferometer has a phase modulator electrode (7,8) and in that a single electrical contact (10) is arranged to apply a common voltage simultaneously to a selected portion (11) in each arm, or selected portions (12-15) in each arm of the waveguides (1-6) that are disposed after the splitter (2) but preceding the phase modulation electrodes, or alternatively that said single electrical contact is arranged to apply said voltage to a selected portion (13) of the input access waveguide (1) connected to said splitter and in one or more selected portions (11) of one or both of said arms after the splitter (2) but preceding the phase modulation electrodes to provide gain or reduced optical loss. |
