Multiplexers and Demultiplexers Based on Fibre Bragg Gratings and Optical Circulators for DWDM Systems

Romero, Rosa; Frazão, Orlando; Floreani, F.; Zhang, Lin; Marques, P. V. S.; Salgado, Humberto

doi:10.1007/978-3-540-45076-4_44

Cited by 4 publications

(1 citation statement)

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“…They do not require electrical power and operate over outdoor temperature range. On the other hand, apodized FBGs with central wavelength accuracy around 0.1 and 0.14 nm at 3 dB bandwidth are also technologically feasible [20], thus making possible to use the FBG-based self-referencing technique in a DWDM upgrading scenario. By adding 40 channels within each of the 5 CWDM bands in the 1520-1610 range, a maximum number over 200 multiplexed optical intensity sensors could be addressed with this DWDM upgrade approach.…”

Section: E Scalability Of the Networkmentioning

confidence: 99%

Radio-Frequency Self-Referencing Technique With Enhanced Sensitivity for Coarse WDM Fiber Optic Intensity Sensors

Montalvo

Frazão

Santos

et al. 2009

J. Lightwave Technol.

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Abstract-A self-referenced passive optical network (PON) with coarse wavelength division multiplexing (CWDM) is reported for remotely addressing optical intensity sensors with enhanced sensitivity. The self-referencing remote configuration is described as a finite-impulse-response (FIR) filter in reflective operation using two fiber Bragg gratings (FBG) and a fiber delay line. The antisymmetrical phase response of the configuration permits to achieve a self-referencing measurement parameter two times more sensitive than reported previously. To enhance the power budget of the network, CWDM devices with low insertion losses are used for spectral splitting of a radio-frequency (RF) modulated broadband light source (BLS). The network topology and the sensor's interrogation technique are theoretically analyzed and experimental results validating the models are reported.Index Terms-Coarse wavelenght-division multiplexing (CWDM), digital filters, fiber Bragg gratings (FBG), fiber delay lines, optical intensity sensors, passive optical networks (PON), self-reference.

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Section: E Scalability Of the Networkmentioning

confidence: 99%