Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 8: Photonics 1

Q 8.4: Talk

Monday, March 14, 2011, 11:15–11:30, SCH A215

Frequency-to-time conversion: A method to easily manipulate the spectrum of optical pulses — •Kambiz Jamshidi and Thomas Schneider — Institut für Hochfrequenztechnik, Hochschule für Telekommunikation, Leipzig, Germany

Frequency-to-time conversion (FTTC) has been successfully used for pulse shaping, packet header recognition, jitter compensation, and packet compression. A dispersive media maps the spectrum of the input signal to the time domain. This is named FTTC and occurs due to the frequency dependent delay property of the dispersion. Linear mapping between the frequency and time domain is obtained if the dispersive media shows pure second order dispersion. FTTC can be implemented via off the shelf components in photonics like: arrayed waveguide gratings, chirped fiber Bragg gratings, photonic crystal structures or even a spool of optical fiber.

In this talk, we will investigate the limitations of this technique and present new applications of FTTC like delaying the optical pulses and dispersion compensation. Several tens of thousands of fractional bits delay is possible by using FTTC. Also, easily tunable dispersion trimming in long haul transmission systems and reconfigurable all optical filters can be realized via this technique.