Fundamentals of Bidirectional Transmission over a Single Optical Fibre

Deventer, M.O. van

doi:10.1007/978-94-009-1579-4

Cited by 32 publications

(14 citation statements)

References 7 publications

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“…As a consequence the wave at will generate sidebands at , where will coincide with the previously mentioned . It should be noted that from a FPM process including three incident waves and all possible degenerated and partially degenerated processes, nine new frequencies will be generated [34]. Fig.…”

Section: A Four-photon Mixingmentioning

confidence: 99%

Fiber-based optical parametric amplifiers and their applications

Hansryd

Andrekson

Westlund

et al. 2002

IEEE J. Select. Topics Quantum Electron.

824

368

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Abstract-An applications-oriented review of optical parametric amplifiers in fiber communications is presented. The emphasis is on parametric amplifiers in general and single pumped parametric amplifiers in particular. While a theoretical framework based on highly efficient four-photon mixing is provided, the focus is on the intriguing applications enabled by the parametric gain, such as all-optical signal sampling, time-demultiplexing, pulse generation, and wavelength conversion. As these amplifiers offer high gain and low noise at arbitrary wavelengths with proper fiber design and pump wavelength allocation, they are also candidate enablers to increase overall wavelength-division-multiplexing system capacities similar to the more well-known Raman amplifiers. Similarities and distinctions between Raman and parametric amplifiers will also be addressed. Since the first fiber-based parametric amplifier experiments providing net continuous-wave gain in the for the optical fiber communication applications interesting 1.5-m region were only conducted about two years ago, there is reason to believe that substantial progress may be made in the future, perhaps involving "holey fibers" to further enhance the nonlinearity and thus the gain. This together with the emergence of practical and inexpensive high-power pump lasers may in many cases prove fiber-based parametric amplifiers to be a desired implementation in optical communication systems.

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Section: A Four-photon Mixingmentioning

confidence: 99%

Fiber-based optical parametric amplifiers and their applications

Hansryd

Andrekson

Westlund

et al. 2002

IEEE J. Select. Topics Quantum Electron.

824

368

View full text Add to dashboard Cite

show abstract

“…However, when these dimensions are large this condition is not performed. The rays incident onto the prism at various angles, during their propagation inside the prism, obtain at the prism output some additional shift Δу (see Exps (10) to (13)) proportional to the prism height and the angle θ of ray incidence onto the prism.…”

Section: Results Of Theoretical Studying the Active Orc With The Dovementioning

confidence: 99%

“…In this case, they use the technique of wavelength division multiplexing (WDM) [2,[7][8][9][10]. However, there is a considerable amount of cautions when multiplexing is not desirable.…”

Section: Introductionmentioning

confidence: 99%

Analysis of multichannel optical rotary connectors based on the compensation operating principle with mirror and prismatic optical compensators (Part 1)

Shapar¹

2017

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. Performed in this work is a comprehensive theoretical computer analysis of performances inherent to two types of multichannel optical rotary connectors (ORC) of compensation operation based on mirror and prismatic compensators. This analysis relies on exact analytical expressions obtained for light ray paths in ORC models with a mirror compensator made in the form of bilateral mirror placed between two optical hemispheres and with prismatic compensator made in the form of Dove prism placed between two non-aberrational elliptic lenses. Found in ORC with the mirror compensator is the essential deficiency inherent to all these constructions, which is related with considerable rotary oscillations in the value of optical signals in mirror angular positions when the mirror halves the input light beam. In these mirror positions, the amplitude value of optical signal oscillations exceeds 95%, and optical losses are higher than -13 dB, when the rotor turns. One deficiency more in these constructions is also strict technical requirements to the accuracy of making the optical components and mechanisms at the level of 1…2 µm. Concerning the ORC construction with a prismatic compensator as well as collimator and focusing lenses common for all the channels, one should note the inadmissibly high optical losses of the signal value (higher than -30…40 dB) in the case of construction with fiber-optic interfaces, and large dimensions and mass in the case of active construction with optoelectronic transducers at the inputs and outputs of ORC. For example, when the number of channels N = 10 the longitudinal dimension of optical transfer channel (prism and lenses) exceeds 300 mm, and this dimension increases with increasing the number of channels. When this dimension is lower than 100 mm, the facility can be equipped with only one optical communication channel containing one LED and one photodiode located on the rotation axis. Optical losses in these constructions cannot be also considered as the satisfactory ones, since the respective loss value is higher than -18 dB for the number of channels N = 10.

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“…Note that a reversible wavelength channel, like a reversible lane in a highway system, can have transmission in only one direction at any moment but with flexibility of the direction being configurable at the setup of a lightpath. We do not consider the case of transmissions in two channels with the same wavelength but different directions because it is possible with short distance fiber links only [36]. As wavelength multiplexers and demultiplexers are in general passive devices and bidirectional, a fiber without isolator to limit the optical signal reflection can be considered as a bidirectional link.…”

Section: A Principle and System Requirementsmentioning

confidence: 99%

On Wavelength-Routed Networks With Reversible Wavelength Channels

Wai

Li³

2013

J. Lightwave Technol.

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We observe that the performance of wavelengthrouted (WR) networks often suffers from asymmetric traffic and network traffic patterns differing from the original design plans. WR networks with a fixed number of channels in a given transmission direction are inflexible. Therefore, we propose reversible wavelength channels. Like a reversible lane in highway systems, a reversible wavelength channel has the flexibility of its transmission direction being configurable at the setup of a lightpath. So far reversible wavelength channels have not been discussed in WR networks even though we observe that most of the required technologies are already available. In this paper, we discuss all the required technologies for implementing reversible wavelength channels in WR networks. We demonstrate that reversible wavelength channel can provide significant performance improvement for WR networks when the traffic is asymmetric. Even if the traffic is symmetric, we also have nontrivial performance improvement with reversible wavelength channels, i.e., the blocking performance of WR networks with reversible wavelength channels will be similar to that of normal WR networks with doubling the number of fibers per link. Different implementation approaches for reversible wavelength channels are discussed. Among them, the performance of the reversible waveband approach is discussed in detail.Index Terms-Lightpath, reversible waveband, reversible wavelength channel, wavelength-routed networks.

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Fundamentals of Bidirectional Transmission over a Single Optical Fibre

Cited by 32 publications

References 7 publications

Fiber-based optical parametric amplifiers and their applications

Fiber-based optical parametric amplifiers and their applications

Analysis of multichannel optical rotary connectors based on the compensation operating principle with mirror and prismatic optical compensators (Part 1)

On Wavelength-Routed Networks With Reversible Wavelength Channels

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