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Toward a chip-scale multiwavelength modelocked semiconductor laser

机译：朝向芯片级多波长型号型半导体激光器

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We describe a chip-scale version of a multiwavelength modelocked semiconductor laser that produces discrete wavelength channels on a 25 GHz grid in the 1550 nm spectral region. The laser utilizes a two-section semiconductor optical amplifier (SOA) device in a partially external cavity which enables tuning of the laser cavity length. Since the wavelength channels are simply the longitudinal modes of the laser cavity, the channel spacing can be easily adjusted to match arbitrary wavelength division multiplexing (WDM) protocols. The hybridly modelocked semiconductor laser produces 5 ps FWHM pulses at 25 GHz pulse-repetition rate. Conversely, we demultiplex individual axial modes and employ them as continuous wave (CW) WDM sources. The modes are characterized through relative intensity noise (RIN) measurement as well as eye-diagrams of pseudorandom data imposed by an external modulator. The modelocked laser functions dually as a compact source of high speed, ultrashort pulses and as an economical source of CW WDM channels.
机译：我们描述了一种在1550nm光谱区域的25GHz网格上产生离散波长信道的多波长型号型半导体激光器的芯片级版本。激光在部分外腔中使用两截面半导体光学放大器（SOA）装置，其能够调谐激光腔长度。由于波长通道仅仅是激光腔的纵向模式，因此可以容易地调整通道间距以匹配任意波分复用（WDM）协议。杂交模型的半导体激光器以25GHz脉冲重复率产生5ps fwhm脉冲。相反，我们将单独的轴向模式解复用并使用它们作为连续波（CW）WDM源。该模式通过相对强度噪声（RIN）测量以及外部调制器施加的伪随机数据的眼图。模型激光功能用作高速，超短脉冲的紧凑源，以及作为CW WDM通道的经济源。

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