| 摘要 |
An optical semiconductor device includes a semiconductor laser diode having a first electrode for receiving a current for driving the laser diode, and a grounding electrode; a modulator for modulating light emitted from the semiconductor laser diode, the modulator having a second electrode for receiving a current for driving the modulator, and a grounding electrode connected to the grounding electrode of the semiconductor laser diode; a first resistor having a terminal connected to the first electrode of the laser diode; a second resistor connected between the second electrode of the modulator and the grounding electrode of the modulator; and a third resistor having a first terminal connected to the grounding electrode of the modulator and a grounded second terminal. Therefore, the laser diode driving current can be made larger when the modulator absorbs the laser light than when the modulator does not absorb the laser light, so that the oscillating wavelength is shortened, resulting in an inexpensive optical semiconductor device that hardly degrades optical pulse transmission performance.
|
