Directly-modulated lasers for high speed optical transmission

Mei Du; Lars Grüner-Nielsen

doi:10.1117/12.746404

21 November 2007 Directly modulated lasers for high speed optical transmission

Mei Du, Lars Grüner-Nielsen

Proceedings Volume 6781, Passive Components and Fiber-based Devices IV; 678134 (2007) https://doi.org/10.1117/12.746404
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

Abstract

Directly modulated lasers (DML) have been widely used in data rate at 2.5 Gb/s and below. The advantages of its simplicity and cost effectiveness have attracted considerable amount of effort in developing DMLs for higher data rate optical transmission systems, especially for short reach applications. The major issue is semiconductor laser's intrinsic modulation bandwidth and the amplitude modulation induced frequency chirp at high speed of 10 Gb/s and beyond. In this paper, we first briefly review the advancement of directly modulated lasers at 10 Gb/s and above. We then present our work on the investigation of using 10 Gb/s directly modulated laser in multiple amplified spans of a typical metro system. The experimental results show that 10 Gb/s DML may have potential to be a cost-effective option for a typical 100GHz spacing DWDM, 6x80km metro link over standard single-mode fiber. The DML performance will also be compared to conventional Mach-Zehnder modulator-based transmitter.

Citation Download Citation

Mei Du and Lars Grüner-Nielsen "Directly modulated lasers for high speed optical transmission", Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 678134 (21 November 2007); https://doi.org/10.1117/12.746404

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