Chirp and frequency offset tolerant coherent burst-mode receiver using directly modulated DFB lasers for coherent PON systems

Author

Dezhao Huang ; Lau, Alan Pak Tao ; Tee-Hiang Cheng ; Chao Lu ; Shuangyi Yan ; Lei Zhou

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore

fYear

2014

fDate

9-10 Nov. 2014

Firstpage

1

Lastpage

4

Abstract

Burst-mode receiver (BMR) is one of the key components in passive optical networks (PONs). When directly-modulated distribution feedback (DFB) lasers are used as transmitter source, the BMR needs to take additional measures to compensate the effects of the laser frequency chirp. In this paper, we design a coherent optical BMR for a directly-modulated DFB laser source with On-Off Keying (OOK) modulation. We show that by increasing the bandwidth of the low-pass filter (LPF) before analog-to-digital converter (ADC), we can receive signal almost unaffected by frequency chirp and frequency offset. By using coherent detection, we can increase the receiver sensitivity thus enlarge the signal transmission distance.

Keywords

amplitude shift keying; analogue-digital conversion; chirp modulation; distributed feedback lasers; fibre lasers; low-pass filters; optical burst switching; optical fibre networks; optical modulation; optical receivers; passive optical networks; ADC; BMR; LPF bandwidth; OOK modulation; analog-to-digital converter; coherent PON systems; directly-modulated distribution ack; frequency offset tolerant coherent burst-mode receiver; laser frequency chirp; low-pass filter; modulated DFB lasers; on-off keying modulation; passive optical networks; receiver sensitivity; signal transmission distance; Bandwidth; Chirp; Measurement by laser beam; Optical filters; Optical transmitters; Passive optical networks; Receivers; Burst mode receiver; directly-modulated laser; frequency chirp; passive optical network;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Communications and Networks (ICOCN), 2014 13th International Conference on

Conference_Location

Suzhou

Type

conf

DOI

10.1109/ICOCN.2014.6987121

Filename

6987121