Abstract
In this paper, a contribution for enhancing the performance of a hybrid tunable Solc filter for 40-Gbps DWDM systems is presented. By using liquid crystal cells with variable birefringence, we have achieved a wavelength tuning of 33 ITU channels, for a 100-GHz frequency spacing, from 1564.69 to 1530.32 nm via a 10-stage hybrid Solc filter. The designed device presents a tuning step of 0.1 nm by applying a voltage difference of 0.2 V. The optical cancelling technique is used to make a 3-dB bandwidth tuning between 0.31 and 1.4 nm. The channel’s bandwidth is adjusted for different kinds of 40-Gbps modulated channels spectra. The 10-stage hybrid Solc filter provides theoretically an insertion loss of 4.6 dB, by using polarizers and birefringent plates characterized by high anti-reflection coatings, while its crosstalk approximates 14 dB. The proposed filter provides very low polarization-dependent loss through the incorporation of a polarization beam splitter and a polarization beam combiner.
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Sadot, D., Boimovich, E.: Tunable optical filters for dense WDM networks. IEEE Commun. Mag. 36, 50–55 (1998)
Aharon, O., Abdulhalim, I.: Tunable optical filter having a large dynamic range. Opt. Lett. 34, 2114–2116 (2009)
Knopf, G.K., Otani, Y.: Optical Nano and Micro Actuator Technology. CRC Press, Boca Raton (2013)
Yenista: XTA-50 highly selective tunable filter (2009). http://www.yenista.com. Access on 2016
Yenista: WS160 flat-top tunable filter with adjustable bandwidth (2009). http://www.yenista.com. Access on 2016
Alnair Labs: Bandwidth-variable tunable filter CVF-220CL (2010). http://www.alnair-labs.com. Access on 2016
Alnair Labs: High power bandwidth-variable tunable filter BVF200 (2010). http://www.alnair-labs.com. Access on 2016
Kyoungsik, Yu., Solgaard, O.: Tunable optical transversal filters based on a Gires–Tournois interferometer with MEMS phase shifters. Quant. Elect. 10, 588–597 (2004)
Pawlowski, E., et al.: Variable bandwidth and tunable centre frequency filter using transversal-form programmable optical filter. Electron. Lett. 32, 113–114 (1996)
Ozoptics: Manually adjustable polarization insensitive variable bandwidth tunable filters (2016). http://www.ozoptics.com/. Access on 2016
Yenista Optics: Xtract—Optical channel drop unit square flat-top tunable filter (2009). www.polytec.com. Access on 2016
TeraXion: TFC-C-Band narrow tunable filter (2014). http://www.teraxion.com. Access on 2016
Benkelfat, B.-E., Zou, Q., Vinouze, B.: Low-voltage continuous tunable hybrid filter for tailored optical-bandwidth operation. IEEE Photon. Technol. Lett. 16, 1098–1100 (2004)
Hamdi, R., Benkelfat, B.-E., Zou, Q., Gottesman, Y.: Bandwidth tuning of hybrid liquid-crystal Solc filters based on an optical cancelling technique. Opt. Commun. 269, 64–68 (2007)
Anritsu: Extract high bit rate modulated channels from DWDM networks (2008). www.anritsu.com. Access on 2016
Bendimerad, D. F.: Contribution à l’étude et à la mise en œuvre de fonction de filtrage pour les brasseurs optiques dédiés au traitement multi-longueurs d’onde. PhD Thesis, Institut National des Télécommunications (INT). Université Abou Bekr Belkaid, Tlemcen (2012)
Newlight Photonics: Calcite crystals (2016). http://www.newlightphotonics.com. Access on 2016
ThorLabs: Full-wave liquid crystal variable retarders (2016). https://www.thorlabs.de. Access on 2016
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Slimane, A.H., Karim, F. A design of a tunable hybrid Solc filter for 40-Gbps DWDM optical systems. Photon Netw Commun 34, 258–265 (2017). https://doi.org/10.1007/s11107-017-0691-2
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DOI: https://doi.org/10.1007/s11107-017-0691-2