All-fibre-optic clock recovery from non-return-to-zero format data

Lee, Hak Kyu; Lee, Changhee; Kang, Seung Bum; Jeon, Min Yong; Kim, Kyong Hon; Lim, Dong Sung; Ahn, Jaewook; Kim, Ho Young; Lee, El-Hang

doi:10.1049/el:19980406

Cited by 19 publications

(7 citation statements)

References 4 publications

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“…An NRZ data sequence was generated by modulating the cw output of a 1535-nm distributed feedback (DFB) laser diode (LD) with a LiNbO electrooptic modulator driven by a pattern generator. To accomplish the all-optical clock recovery function from this NRZ format data a two-stage signal processing procedure is necessary [8]. The first stage process corresponds to a clock component extraction process from the NRZ-type input data stream, which uses an NRZ-to-PRZ format converter based on an AMZI.…”

Section: Methodsmentioning

confidence: 99%

All-optical clock recovery from NRZ data of 10 Gb/s

Lee

Ahn

Jeon

et al. 1999

IEEE Photon. Technol. Lett.

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Section: Methodsmentioning

confidence: 99%

All-optical clock recovery from NRZ data of 10 Gb/s

Lee

Ahn

Jeon

et al. 1999

IEEE Photon. Technol. Lett.

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“…Substituting (7) into (1), the (1) can be represented as (9) where Similarly, substituting (7) and (8) into (2), the (2) can be represented as …”

Section: Theoretical Model Design Of Iir Filtermentioning

confidence: 99%

“…Some high-speed optical clock recovery techniques are demonstrated [7][8][9][10]. As the data rate becomes higher, we find the electronic speed bottleneck become obvious.…”

Section: Introductionmentioning

confidence: 99%

An Active IIR Filter using Coupled Optical Waveguide Rings

Tsao¹,

Chen²,

Chiou³

2002

Journal of Optical Communications

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An active infinite-impulse response (IIR) filter using coupled fiber ring is presented in this paper. The theoretical model is built by using Z-transform technique. Optimal coupling coefficients are sorted for simulating narrow band-pass filters. Those narrow band-pass filters are centered at 160 GHz for next generation high-speed optical communication systems. The pass band can be designed as narrow as 18.75 MHz. The gain of the active IIR filter can be designed up to 67 dB.the Z-transform technique. Due to energy conservation, the coupling ratios of the couplers should satisfy K,, K2, K7, K3 + ~ and K5 + ~«; being any value between 0 and 1, respectively.Simplifying (4), we can find

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“…However, clock extraction from the NRZ signal is more difficult than in the return-to-zero (RZ) format due to its low clock components in the spectrum domain; i.e., the clock components must be enhanced before clock extraction. One of the frequently used methods for this extraction is to convert the NRZ signal to a pseudo-RZ (PRZ) signal [1,2].…”

Section: Introductionmentioning

confidence: 99%