Driving method for tunable semiconductor laser diode, tunable light source device and driving method for the same
文献类型：专利
| 作者 | KATO, TOMOAKI; YAMADA, YOSHIAKI |
| 发表日期 | 1999-03-30 |
| 专利号 | US5889801 |
| 著作权人 | NEC CORPORATION |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Driving method for tunable semiconductor laser diode, tunable light source device and driving method for the same |
| 英文摘要 | A driving method for a tunable semiconductor laser which is remarkably effective for realizing high speed and stable wavelength switching is presented. Generally, when a single longitudinal mode laser oscillation wavelength of a tunable semiconductor laser diode comprising an active region and a wavelength control region is switched from lambda 1 to lambda 2, a wavelength control current ( lambda -Control) supplied to the wavelength control region is switched from I1 to I2. In the driving method according to the present invention, an active layer current (Active) supplied to the active region is temporarily decreased below a predetermined value during a predetermined period, in order to temporarily stop the single longitudinal mode laser oscillation of the laser diode. Preferably, the length of the predetermined period is set longer both before and after the moment of the wavelength control current switching than at least the carrier lifetime in the wavelength control region, and the predetermined value of the active layer current is set below threshold currents of all longitudinal modes existing between longitudinal modes corresponding to oscillation wavelengths before and after the wavelength control current switching. According to the driving method, oscillations at undesirable longitudinal modes are prevented, and thus stable high speed wavelength switchings precisely following supplied wavelength control signals are made possible even in a laser such as a tunable DBR laser diode involving longitudinal mode hops. |
| 公开日期 | 1999-03-30 |
| 申请日期 | 1997-08-28 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/45616]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | NEC CORPORATION |
| 推荐引用方式 GB/T 7714 | KATO, TOMOAKI,YAMADA, YOSHIAKI. Driving method for tunable semiconductor laser diode, tunable light source device and driving method for the same. US5889801. 1999-03-30. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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