Topic
Wavelength-division multiplexing
About: Wavelength-division multiplexing is a research topic. Over the lifetime, 25059 publications have been published within this topic receiving 332027 citations. The topic is also known as: WDM.
Papers published on a yearly basis
Papers
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Patent•
15 Sep 2000TL;DR: In this paper, the angular orientation of the resonant grating filters (10f-10g) is varied slightly to provide reflected signals for the plurality of discrete frequency channels.
Abstract: A wavelength division multiplex/demultiplexer (WDM) has a plurality of narrow-band zeroth order resonant grating filters (10a-10e) to multiplex or demultiplex multiple wavelengths that have very close channel spacing. In one embodiment, a plurality of these filters (10a-10e) are assembled in a block (20) in parallel and at an angle to a propagation axis to reflect signals for a plurality of discrete frequency channels. The block spacing material (21) can be liquid or solid. In another embodiment, the angular orientation of the resonant grating filters (10f-10g) is varied slightly to provide reflected signals for the plurality of discrete frequency channels. Crosstalk between channels can be reduced by reflecting each signal three times. Individual filters can be of binary structure or a sinusoidal grating (16) and can be made using thin film techniques.
93 citations
TL;DR: It is shown that, in the synchronous case, the maximal error-free multiplexity is, in practice, N + 1, and, theoretically, the error probability of the system is analyzed and verified with experimental data.
Abstract: This paper describes a transmission system that uses passive optical multiplexing with gold sequences. The system is composed of an optical fiber network and electrical matched filters, and allows for N + 2 asynchronous stations each with a gold sequence address of length N . We analyze, theoretically, the error probability of the system and verify the results with experimental data. We further show that, in the synchronous case, the maximal error-free multiplexity is, in practice, N + 1 . The features of the System are as follows: 1) The system uses optical multiplexing instead of conventional electrical multiplexing. 2) The number of assignable addresses is large. 3) In the asynchronous case, each station can transmit a code at any time irrespective of other stations' timings.
93 citations
TL;DR: A novel kind of nanoscale plasmonic wavelength demultiplexing structure based on channel drop filters in metal-insulator-metal waveguide with reflection nanocavities that can find more applications for the ultra-compact WDM systems in highly integrated optical circuits is proposed.
Abstract: We propose and numerically investigate a novel kind of nanoscale plasmonic wavelength demultiplexing (WDM) structure based on channel drop filters in metal-insulator-metal waveguide with reflection nanocavities. By using finite-difference time-domain simulations, it is found that the transmission efficiency of the channel drop filter can be significantly enhanced by selecting the proper distance between the drop and reflection cavities. The result can be exactly analyzed by the temporal coupled-mode theory. According to this principle, a nanoscale triple-wavelength demultiplexer with high drop efficiencies is designed. The proposed structure can find more applications for the ultra-compact WDM systems in highly integrated optical circuits.
93 citations
TL;DR: More than 40 WDM channels of 5-10 ps pulse streams were generated over 1530-1570 nm at 6.3 Gbit/s from a single laser source utilizing laser-diode (LD)-pumped supercontinuum in optical fibers as mentioned in this paper.
Abstract: More than 40 wavelength-division-multiplexed (WDM) channels of 5-10 ps pulse streams are generated over 1530-1570 nm at 6.3 Gbit/s from a single laser source utilizing laser-diode (LD)-pumped supercontinuum in optical fibers for the first time. The time-bandwidth products of the generated pulses are within the range of 0.3-0.6, and it has been verified that the generated WDM picosecond pulses are capable of being interleaved to produce up to 40 WDM channels, each consisting of 50 Gbit/s time-division-multiplexed (TDM) pulse streams, in one optical fiber. >
93 citations
TL;DR: In this article, a comparison of carrier-suppressed return-to-zero (CSRZ) and single sideband RZ formats is made in an attempt to find the optimum modulation format for high bit rate optical transmission systems.
Abstract: A comparison of carrier-suppressed return-to-zero (CSRZ) and single sideband return-to-zero (SSB-RZ) formats is made in an attempt to find the optimum modulation format for high bit rate optical transmission systems Our results show that CSRZ is superior to return-to-zero (RZ) and SSB-RZ with respect to signal degradation due to Kerr nonlinearities and chromatic dispersion in wavelength division multiplexing (WDM) as well as in single-channel 40-Gb/s systems over standard single-mode fibers (SSMF) It is shown that CSRZ enables a maximum spectral efficiency of approximately 07 (b/s)/Hz in a N/spl times/40 Gb/s WDM system with equally polarized channels Furthermore, the CSRZ format in N/spl times/40 Gb/s WDM systems shows no further signal degradation compared to single-channel transmission
93 citations