Multitap microwave photonic filter based on a DFB laser array using photonic wire bonding

Author:

Xu Zhenzhen,Yang Tongtong,Sun Zhenxing,Mei Yipeng,Lu Jun,Wang Wenxuan1,Ma Yuxin,Chen Xiangfei

Affiliation:

1. Jiangsu University of Science and Technology

Abstract

We propose and experimentally demonstrate a multitap microwave photonic filter (MPF) based on a distributed feedback (DFB) laser array using photonic wire bonding (PWB). Through the application of the PWB technique, an eight-wavelength DFB laser array with wavelength spacing of 400 GHz was hybrid-integrated with an arrayed waveguide grating multiplexer. Remarkably, the insertion losses of all eight channels are maintained below 5 dB. In the experiments, the larger wavelength spacing allowed us to achieve a sinc MPF with a lower 3 dB bandwidth of 0.22 GHz using only eight taps. Further, Gaussian apodization enabled the out-of-band rejection of the filter to reach 24 dB. These results indicate that the proposed scheme could provide a promising guideline for the MPFs that demand high reconfigurability and greatly reduced size and complexity.

Funder

Chinese National Key Basic Research Special Fund

National Natural Science Foundation of China

Nature Science Foundation of Jiangsu Province of China

Jiangsu Science and Technology Project

Publisher

Optica Publishing Group

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