Constraints Of Incoherent Optical Fiber Signal Processing

Jingshown Wu; Ing-Jiunn Su

doi:10.1117/12.942061

25 November 1987 Constraints Of Incoherent Optical Fiber Signal Processing

Jingshown Wu, Ing-Jiunn Su

Proceedings Volume 0827, Real-Time Signal Processing X; (1987) https://doi.org/10.1117/12.942061
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

Besides optical fibers are excellent communication media, they are attractive for real time, high speed signal processing on the ground of that they possess very nice merits such as low-loss, large bandwidth-delay product, light weight, and immunity to electromagnetical interferences. A typical optical fiber signal processing device is composed of light sources, delay lines, attenuators, directional couplers, and photodetectors. Many various functions such as frequency filtering, convolution, pulse compression, high speed pulse generation, encoding, and decoding for the incoherent optical fiber signal processing devices are reported in the literature. Recently the lattice optical fiber structures are investigated intensively due to convenience for mathematical formulation and implementation. Although the optical fiber signal processing devices have many attractive features, they have inherent constraints owing to positive system properties, i.e. nonnegative quantities of signals(optical intensities), attenuations, and coupling coefficients. The constraints of the finite impulse response (FIR) optical fiber filters were presented. In this paper, we establish the constraints of the infinite impulse response (IIR) optical fiber filters by means of investigating the possibility of designing the filters with the desirable properties such as maximally flat or equiripple responses. In addition, the characteristics and design principles of the optical fiber filters can be clearly understood from the processes. The mathematical derivation makes use of the state-variable analysis technique to approach this problem. This technology is suitable to describe for both cases: FIR and IIR. Hence the confirmed constraints can be directly applied to the FIR case.

Citation Download Citation

Jingshown Wu and Ing-Jiunn Su "Constraints Of Incoherent Optical Fiber Signal Processing", Proc. SPIE 0827, Real-Time Signal Processing X, (25 November 1987); https://doi.org/10.1117/12.942061

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KEYWORDS

Optical fibers

Signal processing

Filtering (signal processing)

Optical filters

Electronic filtering

Optical signal processing

Photodetectors

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