Thermally Controlled Wavelength Locker Integrated in Widely Tunable SGDBR-LD Module

Abstract-Elastic optical networks (EON) have been proposed to meet the network capacity and dynamicity challenges. Hardware and software resource optimization and re-configurability are key enablers for EONs. Recently, innovative multi-carrier transmission techniques have been extensively investigated to realize high capacity (Tb/s) flexible transceivers. In addition to standard telecommunication lasers, optical carrier generators based on optical frequency combs (OFC) have also been considered with expectations of reduced cost and inventory, improved spectral efficiency and flexibility. A wide range of OFC generation techniques have been proposed in the literature over the past few years. It is imperative to summarize the state of the art, compare and assess these diverse techniques from a practical perspective. In this survey, we identify salient features of optical multicarrier generators, review and compare these techniques both from a physical and network layer perspective. OFC demultiplexing/filtering techniques have also been reviewed. In addition to transmission performance, the impact of such sources on the network performance and real-world deployment strategies with reference to cost, power consumption, and level of flexibility have also been discussed. Field trials, integrated solutions, flexibility demonstrations are also reported. Finally, open issues and possible future directions that can lead to real network deployment are highlighted.

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“…Integrated multi-wavelength lockers that display up to 25 GHz accuracy have been reported, reducing the number of WLs required [58], [59].…”

Section: A Disadvantages Of Using Discrete Lasers In a Flex-grid Scementioning

confidence: 99%

A Survey of Optical Carrier Generation Techniques for Terabit Capacity Elastic Optical Networks

Imran

Anandarajah

Kaszubowska-Anandarajah

et al. 2018

IEEE Commun. Surv. Tutorials

107

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“…So we limit our discussion to the latter variable losses 1 L and denote the former invariable losses as a constant 2 L .To calculate the additional losses, there are three analysis models such as uniform plane wave-based model [7,8] , splice loss-based model [9] and single-mode fiber (SMF) power distribution-based model [10] . For the experimental results [10] , splice loss-based model was most suitable of the above three models; the SMF power distribution-based model showed a somewhat similar trend to the results.…”

Section: ． Tuning Range Of Tf-ffpmentioning

confidence: 99%

“…(1), The coefficients of power reflectivity 1 R , and transmission 1 T , denote light traveling through the first fiber end while the coefficients 2 R , and 2 T , denote light traveling through the second interface. The changes of the air gap distance cause changes of the optical path different (OPD) lengths, then generates multiple interference output beams.…”

Section: Principle Of Tf-ffp Interferometermentioning

confidence: 99%

Section: ．Introductionmentioning

confidence: 99%

“…A tunable optical filter with a sufficiently narrow passband and a sufficiently wide tuning range to allow extremely close channel spacings over the entire low-loss optical bandwidth window is necessary in spectral filtering application of DWDM system. Fiber Fabry-Perot filter is the most attractive one among the various filtering devices by its capabilities of wide-band coverage, low-cost and compactness [1][2][3][4] .TF-FFP consists of an air gap and two closely spaced partially reflective fiber face ends, the output wavelength makes use of multiple reflections through adjusting the gap distance. It can be tuned to select any one of multi-channels in a DWDM system or clean up the ASE noise from a broadband source.…”

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confidence: 99%

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Analysis and design of tunable fiber Fabry-Perot filter

2008

SPIE Proceedings

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The effective reflectivity of planar tunable filter fiber Fabry-Perot (TF-FFP) caused by coupling losses would led to the change of tuning range and the full width half maximum (FWHM) in the process of gap distance tuning. The general transfer function expression of FFP is developed by Gaussian beams model and coupling losses. A method that is by appropriate unsymmetrical reflectivity of fiber end can increase the tuning range and reduce the FWHM is proposed, the obtained parameters may be useful for the analysis and design of other TF-FFP. At last the initial gap position and reflectivities of both ends of TF-FFP are designed theoretically for C-band and C+L-band respectively.Keywords: Tunable fiber Fabry-Perot filter, analysis and design,tuning range, initial parameters 1．INTRODUCTIONAccompany with the continuous revolution of Dense Wavelength Division Multiplexing (DWDM) optical network, the technology of node device is promoted to develop rapidly. A tunable optical filter with a sufficiently narrow passband and a sufficiently wide tuning range to allow extremely close channel spacings over the entire low-loss optical bandwidth window is necessary in spectral filtering application of DWDM system. Fiber Fabry-Perot filter is the most attractive one among the various filtering devices by its capabilities of wide-band coverage, low-cost and compactness [1][2][3][4] .TF-FFP consists of an air gap and two closely spaced partially reflective fiber face ends, the output wavelength makes use of multiple reflections through adjusting the gap distance. It can be tuned to select any one of multi-channels in a DWDM system or clean up the ASE noise from a broadband source. The relationship between the output wavelength and their driven voltage of TF-FFP filter is usually established through transmission intensity by photo detector, therefore the tuning range of filter is determined by the peak transmission intensity. The conventional model of multiple beam interference theory is based on the assumption that the light transmitted in the FFP is plane wave, then the output spectrum is the uniform comb spectrum, so the tuning range seems infinite large, but D. Marcuse [5] pointed out that the tuning range of TF-FFP filter is limited by the gap distance, which induced by the mismatch between the mode of fiber and air gap. In this paper we firstly analyzed the additional loss of multiple reflection in the air gap according to the theory of Gaussian beams model, combined the defect or intrinsic losses, the general transfer function expression of TF-FFP is derived. Then the influence of several kinds of initial parameters including initial reflectivity and air gap distance on transmission intensity has been discussed. The proposed approach can provide an important reference for designing and selecting TF-FFP in practice.

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Optical design and analysis of CWDM upstream TWDM PON for NG-PON2

Kim¹,

Park²

2013

Optical Fiber Technology

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Thermally Controlled Wavelength Locker Integrated in Widely Tunable SGDBR-LD Module

Cited by 4 publications

References 7 publications

A Survey of Optical Carrier Generation Techniques for Terabit Capacity Elastic Optical Networks

A Survey of Optical Carrier Generation Techniques for Terabit Capacity Elastic Optical Networks

Analysis and design of tunable fiber Fabry-Perot filter

Optical design and analysis of CWDM upstream TWDM PON for NG-PON2

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