Reconfigurable generation of high-repetition-rate optical pulse sequences based on time-domain phase-only filtering

Abstract

We propose and demonstrate a fiber-based phase-only filtering technique for programmable optical pulse shaping, in which the filtering operation is implemented in the time domain by means of an electro-optical (EO) phase modulator. The technique has been applied for generating customized ultrahigh-repetition-rate optical pulse sequences (>40 GHz) from single input pulses by driving the EO phase modulator with a periodic electronic waveform (RF tone). The generated output pulses are replicas of the input pulse and both the repetition rate and the envelope profile of the generated sequences can be controlled and tuned electronically using this approach.

Programmable All-Fiber Optical Pulse Shaping

“…Previous solutions are based on amplitude-only filtering (Dai & Yao, 2008), amplitude and phase filtering (Petropoulos et al, 2001;Weiner, 1995;Azaña et al, 2003), or phase-only filtering (Azaña et al, 2005;Wang & Wada, 2007;Weiner et al, 1993). In term of power efficiency phase filtering is preferred since the energy is totally preserved with respect to amplitude only or amplitude and phase filtering where some spectral components are attenuated or canceled.…”

“…The very interesting fiber-based solution for programmable pulse shaping proposed in (Azaña et al, 2005) and used in (Wang & Wada, 2007) is based on time-domain optical www.intechopen.com phase-only filtering. This method originates from the most famous technique for programmable optical pulse shaping, based on spatial-frequency mapping (Weiner et al, 1993).…”

“…Therefore the pursuit of an integrated (fiber) pulse shaping solution, including full compatibility with waveguide/fiber devices, which can be able to provide the additional functionality of electronic programmability, manifests to be useful for a lot of different application fields. For this reason a programmable fiber-based phase-only spectral filtering setup has been recently introduced (Azaña et al, 2005;Wang & Wada, 2007). In the next section the working principle of this spectral phase-only linear filtering approach is discussed and an improvement of the solution reported in (Azaña et al, 2005) is presented and widely investigated.…”

“…For this reason a programmable fiber-based phase-only spectral filtering setup has been recently introduced (Azaña et al, 2005;Wang & Wada, 2007). In the next section the working principle of this spectral phase-only linear filtering approach is discussed and an improvement of the solution reported in (Azaña et al, 2005) is presented and widely investigated.…”

Sistemas ópticos incoherentes para la generación de señales arbitrarias basados en filtros fotónicos de microondas

“…Finalmente, existen estructuras similares al esquema convencional de TPS, pero que hacen uso de un modulador de fase. Estas estructuras se proponen para la generación de secuencias de pulsos ópticos [47,48] y también para implementar transformadores de Hilbert [49].…”