Development of high data rate optical transmitter in c-band using external modulation technique

i-manager’s Journal on Electronics Engineering Pub Date : 1900-01-01 DOI:10.26634/jele.12.2.18517

Agrawal Vikas, P. Pandey, R. K. Bahl

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Abstract

This paper presents the development and characterization of high-speed ON-OFF Keying (OOK) Optical Transmitter up to 12 Gbps using External Modulation Technique that comprises Continuous Wave (CW) laser, Mach-Zehnder Modulator (MZM), and ultra-high bandwidth driver amplifier for MZM. The CW laser driver and high bandwidth modulator driver amplifier has been designed and integrated with the modulator which is biased for OOK modulation scheme. This work includes Direct Current (DC), Optical and Radio Frequency (RF) characterization of MZM modulator; selection of suitable bias point for modulator to achieve OOK modulation format, design and development of wideband driver amplifier in microstrip configuration on 25-mil alumina using Hittite device. The biasing circuit for distributed feedback laser is designed as an unmodulated CW optical signal to feed optical modulator. In this work, the assembly and characterization of optical transmitter is also carried out and performance is analyzed in terms of different parameters such as Extinction ratio and Signal-to-Noise Ratio (SNR) etc.

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采用外调制技术研制c波段高数据速率光发射机

本文介绍了一种采用外部调制技术的高达12gbps的高速开关键控(OOK)光发射机的开发和特性，该技术由连续波(CW)激光器、马赫-曾德尔调制器(MZM)和用于MZM的超高带宽驱动放大器组成。设计了连续波激光驱动器和高带宽调制器驱动放大器，并将调制器集成到OOK调制方案中。这项工作包括MZM调制器的直流(DC)、光学和射频(RF)特性;为调制器选择合适的偏置点以实现OOK调制格式，利用Hittite器件设计和开发了25 mil氧化铝微带配置的宽带驱动放大器。将分布式反馈激光器的偏置电路设计为无调制连续波光信号馈送光调制器。在本工作中，还进行了光发射器的组装和表征，并根据消光比和信噪比等不同参数对其性能进行了分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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i-manager’s Journal on Electronics Engineering

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