Optical SCM data extraction using a fiber-loop mirror for WDM network systems

Rossi, Giammarco; Jerphagnon, O.; Olsson, B.-E.; Blumenthal, D.J.

doi:10.1109/68.853543

Cited by 53 publications

(17 citation statements)

References 12 publications

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“…5(e) and 5(f) show measurements just before Mod2 with SCM turned on and off, respectively. The resemblance between the spectra in Fig ' [20] where the notch was too narrow to Ui effectively separate the baseband signal from the :.…”

Section: All-optical Label-swapping Experimentsmentioning

confidence: 93%

“…Subcarrier multiplexed (SCM) header techniques [19,20] allow relatively easy separation of the subcarrier header from the baseband data payload compared to conventional time domain header techniques; it is achieved either in the electrical domain after the OlE conversion [21], or directly in the optical domain without any OlE processing [22]. Very recent publications have reported optical filtering for a single-side-band (SSB) SCM header [4] and optical filtering with an optical loop mirror incorporating a birefringent fiber [20]. The former offers easy removing of the SSB-SCM header using a fiber FabryPerot filter, but requires a sophisticated SSB-SCM transmitter.…”

Section: All-optical Label-swapping Experimentsmentioning

confidence: 99%

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<title>Demonstration of optical packet switching using optical-label switching technologies</title>

et al. 2001

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This paper discusses optical-label switching and an experimental demonstration of high-speed all-optical packet switching with all-optical label-swapping capabilities. The subcarrier optical-label content was optically extracted and compared against the forwarding table, which induced packet forwarding as well as label-swapping decisions. The alloptical label processing technique was immune from dispersion induced fading and polarization induced degradation effects. The packet switching was accomplished by a combination of rapidly tunable wavelength conversion and a uniform-loss cyclic frequency (ULCF) 8x8 arrayed waveguide grating router (AWGR). The packet routing system achieved 600 psec switching time with a forwarding decision time of 250 nsec. All optical label swapping incorporated optical subcarrier filtering using fiber Bragg gratings. Accumulated packet-by-packet Bit-Error-Rate measurements confirm the successful and low-penalty packet routing with label swapping technique, while maintaining optical transparency for the data payload.

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Section: All-optical Label-swapping Experimentsmentioning

confidence: 93%

Section: All-optical Label-swapping Experimentsmentioning

confidence: 99%

<title>Demonstration of optical packet switching using optical-label switching technologies</title>

et al. 2001

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“…However, to the best of our knowledge, it still has not been studied for ODeMux SCM systems with a convincing theoretical model. Most of the previous work [5,8] just simply assumes that the crosstalk is similar to that in EDeMux systems. In this paper, we report an analytical investigation of the inter-modulation crosstalk in ODeMux systems.…”

Section: Introductionmentioning

confidence: 99%

Crosstalk due to optical demultiplexing in subcarrier multiplexed systems

Zhu

2011

Photon Netw Commun

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We report an in-depth investigation of the intermodulation crosstalk in subcarrier multiplexing (SCM) systems with optical demultiplexing (ODeMux). Both theoretical derivations and numerical simulations show that the crosstalk in ODeMux systems mainly comes from the nonlinear mixing of the baseband and subcarrier modulations inside the signal channels. Several key parameters are then studied to estimate their effects on the magnitude of the crosstalk. As a result, performance optimization strategies are proposed for ODeMux SCM systems. In order to further enhance the transmission performance of ODeMux SCM systems, we discuss two techniques to suppress the inter-modulation crosstalk and analyze their effectiveness with numerical simulations.

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“…The transmission/reflection spectra are sensitive to the RI surrounding the microfibers, and RI sensitivity of 20 Optical comb filters as multichannel filters have been studied intensively for application in wavelength division multiplexing (WDM) communication systems [7], and filters with flattop are particularly attractive for DWDM systems due to signal fidelity and tolerance of signal wavelength drift. Especially, all-fiber comb filters based on a Sagnac fiber loop mirror (FLM) are popularly used for all-optical signal processing and multiwavelength fiber lasers [8][9][10] due to lower insertion loss and better performance.In this Letter, we investigate the use of highly birefringent (Hi-Bi) microfiber-based FLMs for tunable comb filters and high sensitivity refractive index (RI) sensors. Two different configurations are studied.…”

mentioning

confidence: 99%

“…Especially, all-fiber comb filters based on a Sagnac fiber loop mirror (FLM) are popularly used for all-optical signal processing and multiwavelength fiber lasers [8][9][10] due to lower insertion loss and better performance.…”

mentioning

confidence: 99%

Tunable comb filters and refractive index sensors based on fiber loop mirror with inline high birefringence microfiber

et al. 2013

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Highly birefringent (Hi-Bi) microfiber-based fiber loop mirrors (FLMs) were studied for tunable comb filters and refractive index (RI) sensors. The use of two cascaded Hi-Bi microfibers instead of a single microfiber allows more flexibility in controlling the transmission/reflection characteristics of the FLM. The length of Hi-Bi microfibers is of the order of centimeters, one or even more than two orders of magnitude shorter than the conventional Hi-Bi fiber-based FLM devices. The transmission/reflection spectra are sensitive to the RI surrounding the microfibers, and RI sensitivity of 20 Optical comb filters as multichannel filters have been studied intensively for application in wavelength division multiplexing (WDM) communication systems [7], and filters with flattop are particularly attractive for DWDM systems due to signal fidelity and tolerance of signal wavelength drift. Especially, all-fiber comb filters based on a Sagnac fiber loop mirror (FLM) are popularly used for all-optical signal processing and multiwavelength fiber lasers [8][9][10] due to lower insertion loss and better performance.In this Letter, we investigate the use of highly birefringent (Hi-Bi) microfiber-based FLMs for tunable comb filters and high sensitivity refractive index (RI) sensors. Two different configurations are studied. One incorporates a single piece of twisted Hi-Bi microfiber in a Sagnac loop, while the other includes two pieces of Hi-Bi microfibers cascaded along a fiber with a rotation of their birefringence axes. This work on microfibers may result in novel applications, such as wavelengthscale light transmission and interconnection, which are useful for photonic integration, computing, and nanoscale sensing.The Hi-Bi microfiber is made from a commercial SMF-28 (outer diameter D ∼ 125 μm, core diameter d ∼ 8.2 μm, Δn ∼ 0.36%) [11]. The SMF-28 fiber is first "processed" by use of a femtosecond IR laser system (Fig. 1) to cutting away parts of the silica cladding on opposite sides of the SMF, resulting in an approximately square-like cross section [inset (a) in Fig. 1]. Figure 2 shows photos of a "processed" SMF with a cutting away depth of ∼26 μm, and a length of ∼3 mm. The "processed" SMF is then taper-drawn to micrometer size by use of a flame-brushing technique. The cross-sectional shape of the "processed" region is well preserved during the initial taper-drawn process and eventually turns to an approximately elliptical shape when the fiber diameter is reduced down to wavelength scale, which generates a high birefringence of the order of 10 −2 [11], much bigger than conventional polarization maintaining fibers. The insertion loss of the tapered microfibers with diameter above 2 μm is in general considerably smaller than 0.2 dB. The ellipticity depends on the depth of the cut and the parameters used in the tapering process.To fabricate two cascaded Hi-Bi microfibers along the same SMF, the SMF is first cut at one location and the Fig. 1. Schematic of the femtosecond IR laser system. Insets: artistic view of the idealiz...

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Optical SCM data extraction using a fiber-loop mirror for WDM network systems

Cited by 53 publications

References 12 publications

<title>Demonstration of optical packet switching using optical-label switching technologies</title>

<title>Demonstration of optical packet switching using optical-label switching technologies</title>

Crosstalk due to optical demultiplexing in subcarrier multiplexed systems

Tunable comb filters and refractive index sensors based on fiber loop mirror with inline high birefringence microfiber

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