Low-cost package of 30Gbps pluggable parallel optical transmitter module

Abstract

This paper describes a 12-channels parallel optical transmitter module with a MPO-Connector designed for a very short reach OC-192 and SNAP 12 specifications. It is important to design the micro array lens for better couple efficiency of array optical transmitter module. The authors design the high accuracy micro array lens for injection modeling to reduce the price and suit for further mass production. In this 12-channel parallel optical transmitter module, it is very difficult to posit the chip on correct position according to guide pin or guide pin hole. Therefore, the authors develop the method of two steps flip chip bonding to release the difficulty of chip alignment on ceramic substrate without two guide pin holes. The performance of the module is demonstrated to fulfill the requirements of SNAP 12[1]. The extinction ratio of the 12-channels array transmitter module is tested above 6dB, respectively. The optical shift by heat is an important factor affecting the performance of the array module. Thermal analysis of 12-channel parallel optical transmitter module is used to improve the effect of optical shift by heat in this paper. And the temperature among the case of transmitter module is greatly reduced from 52.7 degree to 31.9 degree. In this paper, a 12-channel array transmitter module package and thermal simulation are discussed and tested. This is a low cost package design and is suitable for mass production.