All-optical RF filter using amplitude inversion in a semiconductor optical amplifier

Coppinger, F.; Yegnanarayanan, Siva; Trinh, P.D.; Jalali, Bahram

doi:10.1109/22.618457

Cited by 73 publications

(28 citation statements)

References 19 publications

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“…The samples are weighted, delayed and combined before the optical signal is received and converted to the output processed electronic signal. An extensive literature [2][3][4][5][6][7][8][9][10] reflects the large efforts done to demonstrate tunable [2][3][4][5], reconfigurable [3][4][5][6], high Q [7] and low cost [8] microwave photonic filters, although it rarely includes practical applications for them. We presented in an earlier contribution a photonic approach feasible for UMTS filtering [9] based on a classical FIR transversal with 30 gratings and 4 switched delay lines, but the lack of compactness, the number of photonic components and difficult fabrication were their main disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Active recirculating structures for UMTS noise and interference suppression

Ortega

Mora

Capmany

et al. 2006

2006 International Topical Meeting on Microwave Photonics

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We present a tunable microwave photonic filter based on an Erbium Doped Fiber cavity formed by two chirped Fiber Bragg gratings for noise and interference suppression in UMTS base stations. Experimental results demonstrate the feasibility of these filters for UMTS applications, and also show a large flexibility on their response based on the critical role of EDF gain in these systems. Tunability of the filters has been employed for UMTS channels selection and EDF gain has been tuned in order to achieve appropriate filter bandwidths. In this way, high Q multifunctional tunable filters are easily implemented.

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Section: Introductionmentioning

confidence: 99%

Active recirculating structures for UMTS noise and interference suppression

Ortega

Mora

Capmany

et al. 2006

2006 International Topical Meeting on Microwave Photonics

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show abstract

“…One straightforward approach to generating negative coefficients is to perform differential detection using a balanced photodetector (PD) [3]. Other techniques to generate negative coefficients include the use of crossgain modulation (XGM) [4] or cross polarization modulation (XPolM) [5] in a semiconductor optical amplifier (SOA), carrier depletion effect in a distributed-feedback laser diode (LD) [6] or in a Fabry-Pérot LD [7], and the use of the transmission of a broadband source through uniform fiber Bragg gratings (FBGs) [8]. Negative coefficients can also be generated by biasing a pair of Mach-Zehnder modulators (MZMs) at the opposite slopes of the transfer functions to achieve amplitude inversion [9], or by using a single dual-output MZM with a double-pass modulation [10].…”

Section: Introductionmentioning

confidence: 99%

Nonuniformly Spaced Photonic Microwave Delay-Line Filters and Applications

Dai

Yao

2010

IEEE Trans. Microwave Theory Techn.

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A finite impulse response (FIR) filter for microwave signal processing implemented based on an optical delay-line structure with uniformly spaced taps has been extensively investigated, but the realization of such a filter with negative or complex tap coefficients to provide an arbitrary frequency response is still a challenge. In this paper, an overview of photonic microwave delay-line filters with nonuniformly spaced taps, by which an arbitrary bandpass frequency response can be achieved with all-positive tap coefficients, is presented. We show that the nonuniform time delays provide equivalent phase shifts to the tap coefficients, while the all-positive-coefficient nature simplifies greatly the filter realization. Based on the theory, a 50-tap flat-top bandpass filter with a quadratic phase response is designed and analyzed. A seven-tap nonuniformly spaced photonic microwave filter with a flat-top and chirp-free bandpass response is then demonstrated. The use of the proposed technique for advanced microwave signal processing is then discussed. The generation of a chirped microwave signal and a phase-coded microwave signal are discussed and demonstrated. The use of the proposed technique to design a FIR filter for microwave matched filtering is also discussed and experimentally demonstrated.Index Terms-Finite impulse response (FIR), microwave photonics, nonuniformly spaced sampling, optical processing of microwave signals.

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“…There are other techniques to produce negative coefficients as well such as using cross gain modulation, differential MZM, using PM-IM conversion techniques etc. One approach among the several techniques proposed for negative coefficient is to use wavelength conversion based on cross-gain modulation (XGM) in semiconductor optical amplifier (SOA) [5]. A tunable laser source with wavelength ƛ 1 modulated by RF signals splits into two parts, one goes through optical fibre with time delay other combines with continuous wave laser source of different wavelength ƛ 2 and goes through SOA.…”

Section: ) Delay Line Filters With Negative Coefficientsmentioning

confidence: 99%

Microwave Photonic Filter: A Systematic Literature Review

Mishra¹,

Gupta²

2017

International Journal of Advanced Research in Computer and Comm

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An overview of microwave photonic filters which are implemented in both incoherent and coherent operational regimes has been provided. For microwave photonic filters implemented in the incoherent regime, an incoherence light source usually a broadband light source such as a light-emitting diode source, an amplified spontaneous emission source, or a laser array is needed. Importance of negative coefficients and complex coefficients in photonic FIR filters is discussed in detail. In this paper various technique reported in the last few year for both incoherent and coherent regime microwave photonic filter are reviewed with significance on the system architecture of microwave photonic filters , photonic generation , processing of time-delay microwave photonic signals, tunable and reconfigurable microwave photonic filters. Complexity and challenges in system implementation for widespread use for practical application and possibilities of newer research in microwave photonic were also discussed.

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All-optical RF filter using amplitude inversion in a semiconductor optical amplifier

Cited by 73 publications

References 19 publications

Active recirculating structures for UMTS noise and interference suppression

Active recirculating structures for UMTS noise and interference suppression

Nonuniformly Spaced Photonic Microwave Delay-Line Filters and Applications

Microwave Photonic Filter: A Systematic Literature Review

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