Exact laser line-width requirements evaluation for optical PSK homodyne communication systems with Dither loop

被引：4

作者：

Banerjee, A. ^{[1
]}

Das, N. R. ^{[2
]}

Biswas, B. N. ^{[3
]}

机构：

[1] Acad Technol, Dept Applied Elect & Instrumentat Engn, Hooghly 712121, W Bengal, India

[2] Univ Calcutta, Inst Radiophys & Elect, Kolkata 700009, W Bengal, India

[3] SKF Grp Inst, Educ Div, Hooghly 712139, W Bengal, India

来源：

OPTIK | 2013年 / 124卷 / 21期

关键词：

Voltage controlled oscillator; Optical phase-locked loop; Power to line-width ratio; PHASE-LOCKED LOOP; PERFORMANCE ANALYSIS; RECEIVERS; LOCKING;

D O I：

10.1016/j.ijleo.2013.03.032

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The laser line-width required in PSK homodyne communication systems with Dither phase-locked loop receivers are exactly evaluated. It is shown that second-order phase-locked loops require at least 0.2 pW of signal power per every Hz of laser line-width (this number refers to the system with the detector responsivity 0.94 A/W, damping ratio 0.707, and the phase error standard deviation 10 degrees). This signal power is used for phase locking, and is, therefore lost from the data receiver. This study for the first time shows the imperfect-phase-recovery-induced power penalty as a function of laser line-width. It can be estimated from the theoretical result that an optimal dither phase locked-loop receiver requires the laser line-width as Delta upsilon <= 3.14 x 10(-5) x R-b, where R-b is the system bit rate. This number refers to the system with power penalty of 1 dB at BER = 10(-10). (C) 2013 Elsevier GmbH. All rights reserved.

引用

页码：4917 / 4920

页数：4