Charbonneau-Lefort M, Fejer M M, Afeyan Bedros
E L Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Opt Lett. 2005 Mar 15;30(6):634-6. doi: 10.1364/ol.30.000634.
We present a broadband optical parametric amplifier design using tapered gain and tandem chirped quasi-phase-matching gratings to obtain flat gain and group-delay spectra suitable for applications such as ultrashort-pulse amplification and fiber-optic communication systems. Although a tapered-gain amplifier consisting of a single chirped grating can provide constant gain over a wide frequency range, it cannot be used to control the group delay across the spectrum. We propose controlling both the gain and the group delay profiles using a two-stage amplifier configuration, in which the idler of the first is used as the input signal of the second.
我们提出了一种宽带光学参量放大器设计，该设计使用渐变增益和串联啁啾准相位匹配光栅，以获得适用于超短脉冲放大和光纤通信系统等应用的平坦增益和群延迟谱。尽管由单个啁啾光栅组成的渐变增益放大器可以在很宽的频率范围内提供恒定增益，但它不能用于控制整个频谱的群延迟。我们建议使用两级放大器配置来控制增益和群延迟分布，其中第一级的闲频光用作第二级的输入信号。
