Vargas Salvador, Vazquez Carmen
Department of Electronic Technology, Universidad Carlos III de Madrid, Ave Universidad No. 30, CP 28911 Leganés, Madrid, Spain.
Opt Express. 2010 Dec 6;18(25):25936-49. doi: 10.1364/OE.18.025936.
We propose a novel synthesis method for designing flexible, tunable non-periodic filters. It is based on a building block which is presented by first time for these purposes, being the poles position tuned by means of a coupling coefficient and an amplifier gain. We present the device, the design equations and a design of a filter with flat response, 54 dB of crosstalk and less than 1.3 dB of ripple to explain and validate the method. These filters can be used as part of optical cross-connects for selecting channels avoiding very restrictive free spectral ranges. Also we check the correct operation of the device, against fabrication tolerances of coupling coefficients. Frequency dependence of the transfer function poles as a unique feature improving the crosstalk of the device spectral response is also analyzed.
我们提出了一种用于设计灵活、可调谐非周期滤波器的新颖合成方法。它基于一种首次为此目的而提出的构建模块，其极点位置通过耦合系数和放大器增益进行调整。我们展示了该器件、设计方程以及一个具有平坦响应、54 dB串扰和小于1.3 dB纹波的滤波器设计，以解释和验证该方法。这些滤波器可用作光交叉连接的一部分，用于选择通道，避免非常受限的自由光谱范围。此外，我们针对耦合系数的制造公差检查了器件的正确运行情况。还分析了传递函数极点的频率依赖性，这是改善器件光谱响应串扰的一个独特特性。
