Title :
Optical DPASK and DQPSK: a comparative analysis for linear and nonlinear transmission
Author :
Yadin, Oav ; Orenstein, Meir ; Shtaif, Mark
Author_Institution :
Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa
Abstract :
The performance of two multilevel modulation formats, differential-phase-amplitude shift-keying (DPASK) and differential quadrature-phase-shift keying (DQPSK), is compared for linear and nonlinear channels. For DPASK, the optimal extinction ratio is derived for both linear and nonlinear transmission. It is shown that for single-channel transmission, DQPSK outperforms DPASK in linear channels, whereas DPASK achieves better performance when nonlinear impairments are present
Keywords :
amplitude shift keying; optical fibre communication; optical modulation; quadrature phase shift keying; telecommunication channels; differential quadrature-phase-shift keying; differential-phase-amplitude shift-keying; linear channels; linear transmission; multilevel modulation formats; nonlinear channels; nonlinear impairments; nonlinear transmission; optical DPASK; optical DQPSK; optimal extinction ratio; single-channel transmission; Amplitude modulation; Extinction ratio; Fiber nonlinear optics; Intersymbol interference; Nonlinear optics; Optical receivers; Performance analysis; Phase modulation; Phase noise; Pulse modulation; Differential-phase-shift keying (DPSK); optical fiber communication; phase modulation; phase noise;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2006.876193
