Optical dispersion monitoring technique using double sideband subcarriers

An chromatic dispersion monitoring method based on spectral-shift of SOA

“…The dynamical monitoring range is ±60 ps/nm and the monitoring precision is about 5 ps/nm. This method can be suitable for the application in dynamical dispersion compensation of high speed optical communication systems.CLC numbers: TN292.11 Document code: A Article ID:Previous works on dispersion monitoring have resulted in the development of numerous approaches, for example, detecting the intensity modulating from a phase modulation [1,2] , modulating the frequency of the transmitted data signal and monitoring the clock deviation [3] , inserting in-band subcarriers [1] in the transmitter and monitoring their radio frequency tones [4,5] , adding an amplitude-modulated doublesideband subcarrier to the signal and measuring the phase delay between two subcarrier tones [6] , extracting the clock component and measuring its RF power [7] , and so on.In this paper, we propose a new and simple remnant dispersion monitoring method based on spectral shift effect of semiconductor optical amplifiers (SOAs). It is best suited for application in high speed optical communication system with single channel speed of 40 Gbit/s and CSRZ format.…”

“…Previous works on dispersion monitoring have resulted in the development of numerous approaches, for example, detecting the intensity modulating from a phase modulation [1,2] , modulating the frequency of the transmitted data signal and monitoring the clock deviation [3] , inserting in-band subcarriers [1] in the transmitter and monitoring their radio frequency tones [4,5] , adding an amplitude-modulated doublesideband subcarrier to the signal and measuring the phase delay between two subcarrier tones [6] , extracting the clock component and measuring its RF power [7] , and so on.…”

Online chromatic dispersion monitoring and compensation using a single inband subcarrier tone

“…However, these methods require electronics that are fairly difficult to implement for higher data rates. Previous reported work on optical techniques for dispersion monitoring has included: 1) measuring the phase delay between two out-of-band subcarrier tones [4]; 2) adding a phase modulation at the transmitter and measuring the phase-to-amplitude modulation conversion at the receiver [5]; and 3) modulating the frequency of the transmitted data signal and then monitoring the clock phase deviation at the receiver [6]. We demonstrate a simple technique for dispersion monitoring by adding a single inband subcarrier tone to the transmitted data signal.…”

Analysis of signed chromatic dispersion monitoring by waveform asymmetry for differentially-coherent phase-modulated systems

“…Traditionally, CD can be monitored by phase-modulating the optical carrier [4] or inserting tones at the transmitter [5][6][7][8] and measuring the power of a CD-induced RF tone at the receiver. Alternatively, such RF tone can be obtained from clock tones for pulse shapes such as Non Return-to-Zero (NRZ)-, Return-to-Zero (RZ)-and Carrier-Suppressed (CS)-RZ OnOff Keying (OOK) [9].…”