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.
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TL;DR: In this paper, a dispersion compensating fiber (DCF) was used for the pumping light source and the DCF was completely compensated for by means of the Raman gain over 50 nm bandwidth within /spl plusmn/0.5 dB variation.
Abstract: Broadband Raman amplification is demonstrated in a dispersion compensating fibre (DCF). A polarisation combined four channel wavelength division multiplexing 14 xxnm laser diode unit is used for the pumping light source. Losses in the DCF are completely compensated for by means of the Raman gain over 50 nm bandwidth within /spl plusmn/0.5 dB variation.
87 citations
TL;DR: In this paper, a review is given on the principles of optical fiber Bragg grating (FBG) sensors and their applications in textile structural composites (TSCs), where the intrinsic wavelength division multiplexing and localized sensing abilities of FBGs are their most important advantages as they provide an effective means for monitoring physical parameters along a single fiber path.
87 citations
TL;DR: It is demonstrated that high-performance low-complexity SSB DD transmissions can be achieved by generating a digital carrier (virtual carrier) together with the complex information-bearing signal at the transmitter using only two digital-to-analog converters.
Abstract: Supporting the ever-increasing data-center-inter-connect traffic in a cost-effective manner is a great challenge, which requires innovative transmission and digital signal processing (DSP) techniques. Recently, single-side-band (SSB) direct-detection (DD) transmissions have been actively considered for data rates beyond 100 Gb/s per channel and distance of hundreds of kilometers due to its capability of electronic chromatic dispersion compensation. In addition, several effective DSP techniques to mitigate or suppress the signal-signal beating interference (SSBI) due to the squared-law detection of the photodiode have been intensively investigated, such as Kramers–Knonig (KK) and SSBI cancellation schemes, showing promising performance at data rates over 200 Gb/s and distance beyond 100 km. In this paper, we demonstrate that high-performance low-complexity SSB DD transmissions can be achieved by generating a digital carrier (virtual carrier) together with the complex information-bearing signal at the transmitter using only two digital-to-analog converters. Combining this transmission technique with either the KK field reconstruction or a two-stage SSBI cancellation scheme at the receiver, eight-channel WDM signals with a net data rate of 1.72 Tb/s have been transmitted successfully over a record span length of 200 km at 1550 nm.
86 citations
21 Feb 1999
TL;DR: In this paper, a hybrid amplifier comprised of a distributed Raman amplifier pumped at two wavelengths and an erbium-doped fluoride fiber amplifier was used to achieve 1.5dB gain-flatness over 67 nm.
Abstract: A 1.5-dB gain-flatness over 67 nm is achieved with a novel hybrid amplifier comprised of a distributed Raman amplifier pumped at two wavelengths and an erbium-doped fluoride fiber amplifier. Fourteen 2.5-Gb/s signals spanning 65 nm are successfully transmitted over 900 km using the new amplifiers. Low-noise characteristics compared to the same transmission line with discrete erbium-doped fiber amplifiers are also confirmed.
86 citations
Patent•
17 Feb 2006TL;DR: In this paper, an integrated wired and wireless wavelength division multiplexing passive optical network (WDM PON) with a light source mode-locked to fed incoherent light is considered.
Abstract: Integrated wired and wireless wavelength division multiplexing passive optical network (WDM PON) apparatus using a light source mode-locked to fed incoherent light includes: a fed light generator for providing fed light for up/downstream signals via a broadband light source emitting an incoherent optical signal; a central office (CO) for receiving, mode-locking, and downstream-optical-transmitting the incoherent optical signal generated by the fed light generator and receiving and optical-detecting an upstream optical signal transmitted from a subscriber unit; and the subscriber unit for receiving, mode-locking, and upstream-optical-transmitting the incoherent optical signal generated by the fed light generator and receiving and optical-detecting a downstream optical signal transmitted from the CO, wherein a wired optical transmitter for transmitting a baseband wired signal and a wireless optical transmitter for transmitting a high frequency radio frequency (RF) signal are comprised for up/downstream optical transmission of the CO and the subscriber unit.
86 citations