Novel all-optical quaternary amplitude shift keying modulation technique based on cross-gain modulation in a semiconductor optical amplifier

被引：3
|
作者：
Dahan, David [1 ]
Mahlab, Uri [1 ,2 ]
Levy, David [1 ]
机构：
[1] ECI Telecom, Network Solut Div, IL-49517 Petah Tiqwa, Israel
[2] Holon Inst Technol, Dept Elect Engn, IL-58102 Holon, Israel
来源：
OPTICAL ENGINEERING | 2009年 / 48卷 / 05期
关键词：
optical processing; optical communication; modulation; semiconductor;
D O I：
10.1117/1.3139297
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a novel all-optical quaternary shift keying (4-ASK) modulation technique based on the cross-gain modulation in a semiconductor optical amplifier (SOA) of a modulated probe with moderate extinction ratio. Experimental demonstrations are presented for 20-Gb/s non return to zero (NRZ) and return to zero (RZ) 4-ASK signals with different level distributions and extinction ratios. The dispersion tolerance limitations are investigated. RZ 4-ASK signals show better dispersion robustness (with accumulated dispersion range from -240 to 350 ps/nm) than NRZ 4-ASK signals due to their reduced frequency chirp. (C) 2009 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3139297]
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页数：5
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