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    • 7. 发明申请
    • WAVELENTH-TUNABLE VERTICAL CAVITY SURFACE EMITTING LASER AND METHOD OF MAKING SAME
    • 水平方向垂直孔表面发射激光器及其制造方法
    • WO2002097934A2
    • 2002-12-05
    • PCT/EP2002/005861
    • 2002-05-28
    • LEDENTSOV, Nikolai, NikolaevichSHCHUKIN, Vitaly, Alexandrovich
    • LEDENTSOV, Nikolai, NikolaevichSHCHUKIN, Vitaly, Alexandrovich
    • H01S3/00
    • H01S5/18302H01S5/0264H01S5/06206H01S5/1833H01S5/18341
    • A wavelength tunable semiconductor vertical cavity surface emitting laser which includes at least one active element including an active layer generating an optical gain by injection of a current, and at least one phase control element, and mirrors. The phase control element contains a modulator exhibiting a strong narrow optical absorption peak on a short wavelength side from the wavelength of the laser generation. The wavelength control is realized by using a position-dependent electro-optical effect. If a reverse bias is applied, the absorption maximum is shifted to longer wavelengths due to the Stark effect. If a forward bias is applied, a current is injected and results in the bleaching and reduction of the peak absorption. In both cases a strong modulation of the refractive index in the phase control element occurs. The effect tunes the wavelength of the cavity mode, and the sign and the value of the wavelength shift are defined by the position of the modulator. Two phase control cascades can be implemented into the laser, one of which shifts the wavelength of the emitted light to larger values, and the other shifts the wavelength of the emitted light to smaller values. A power equalizing element can be used in such laser allowing either to maintain the constant output power at different emission wavelengths or to realize an independent frequency and amplitude modulation. A photodetecting element can be implemented in the laser allowing calibration of the laser for all operations.
    • 一种波长可调谐半导体垂直腔表面发射激光器,其包括至少一个有源元件,该有源元件包括通过注入电流产生光学增益的有源层以及至少一个相位控制元件和反射镜。 相位控制元件包含在激光产生的波长的短波长侧表现出强窄的光吸收峰的调制器。 通过使用位置相关的电光效应来实现波长控制。 如果施加反向偏压,则由于斯塔克效应,吸收最大值被转移到更长的波长。 如果施加正向偏压,则注入电流并导致峰值吸收的漂白和降低。 在这两种情况下,发生相位控制元件中的折射率的强调制。 该效果调节腔模式的波长,波长偏移的符号和值由调制器的位置定义。 两个相位控制级联可以实现到激光器中,其中一个将发射的光的波长偏移到更大的值,另一个将发射的光的波长偏移到更小的值。 功率均衡元件可以用于这样的激光器中,以允许在不同的发射波长下保持恒定的输出功率或实现独立的频率和幅度调制。 可以在激光器中实现光电检测元件,从而可以对所有操作的激光进行校准。