The paper describes design and analysis of Tera Hertz Optical Asymmetric Demultiplexer (TOAD) switch using quantum dot semiconductor optical amplifier (QDSOA) and all- optical digital to analog converter (DAC). The QDSOA based TOAD or QDSTOAD and the DAC performance optimization for control power variations shows that 1.5 mW pump or control power gives the optimized performance as far as the extinction ratio is concerned for the TOAD. At the same power absolute error (ε) and dynamic range for DAC also shows maximum. The present paper investigates relative output, absolute error and dynamic range for the performance analysis of the DAC. An absolute error as low as 0.25% and dynamic range (11.765 dB) very close to the ideal value (11.761 dB) ensures effectiveness of these devices. These devices show immunity to the amplified spontaneous emission noise.

本文介绍了使用量子点半导体光放大器（QDSOA）和全光数模转换器（DAC）的Tera Hertz光学非对称多路分解器（TOAD）开关的设计和分析。基于QDSOA的TOAD或QDSTOAD以及针对控制功率变化的DAC性能优化表明，就TOAD的消光比而言，1.5 mW的泵浦或控制功率可提供最佳性能。在相同功率下，DAC的绝对误差（ε）和动态范围也显示为最大值。本文研究了用于DAC性能分析的相对输出，绝对误差和动态范围。绝对误差低至0.25％，动态范围（11.765 dB）非常接近理想值（11.761 dB），可确保这些设备的有效性。