Encoding and transmission of orthogonally optical label switching using DQPSK payload and MD-RZ label

Yufeng Shao; Shuangchun Wen; Lin Chen; Yaoqiang Xiao

doi:10.1117/12.756289

4 January 2008 Encoding and transmission of orthogonally optical label switching using DQPSK payload and MD-RZ label

Yufeng Shao, Shuangchun Wen, Lin Chen, Yaoqiang Xiao

Proceedings Volume 6837, Information Optics and Photonics Technologies II; 68370N (2008) https://doi.org/10.1117/12.756289
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

Optical label switching (OLS) has been regarded as an efficient technique to route and forward IP packets transparently in the optical layer. In label switching system, orthogonal modulation has shown some advantages, such as its high spectral efficiency. One example is the combination of amplitude-shift-keying (ASK) label and differential phase-shift-keying (DPSK) payload. However, differential quadrature phase-shift-keying (DQPSK) payload has not been used in optical label switching system yet. In this letter, we propose and demonstrate a novel optical label switching scheme by the combination modified return zero (MD-RZ) and DQPSK for the first time. The transmitter is set up by cascading two phase modulators (PM) and one dual-arm LiNbO3 modulator (LN-MOD). The signal is first phase modulated by two PMs. The MD-RZ label is then impressed by the subsequent LN-MOD. Duty cycle and extinction ratio of the MD-RZ labels are tunable. The DQPSK payload can be used in a 20Gbit/s optical label switching system, with 2-bit per symbol modulation/demodulation. Within the network, the label information is read, processed and updated, a process known as label switching, until the burst reaches the desired egress edge node. The use of balanced detection is expected to improve performance for the payload. The transmission performance of 20Gbit/s DQPSK payload with 2.5Gb/s MD-RZ-ASK label is also analysed. MD-RZ labeling of a DQPSK payload has been shown to be a promising candidate for the implementation of OLS system.

Citation Download Citation

Yufeng Shao, Shuangchun Wen, Lin Chen, and Yaoqiang Xiao "Encoding and transmission of orthogonally optical label switching using DQPSK payload and MD-RZ label", Proc. SPIE 6837, Information Optics and Photonics Technologies II, 68370N (4 January 2008); https://doi.org/10.1117/12.756289

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available