Photonic Generation of Chirped Millimeter-Wave Pulses Based on Nonlinear Frequency-to-Time Mapping in a Nonlinearly Chirped Fiber Bragg Grating

Wang, Chao and Yao, Jianping (2008) Photonic Generation of Chirped Millimeter-Wave Pulses Based on Nonlinear Frequency-to-Time Mapping in a Nonlinearly Chirped Fiber Bragg Grating. IEEE Transactions on Microwave Theory and Techniques, 56 (2). pp. 542-553. ISSN 0018-9480. (doi:https://doi.org/10.1109/TMTT.2007.914639) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1109/TMTT.2007.914639

Abstract

A novel approach to optically generating chirped millimeter-wave pulses with tunable chirp rate based on spectral shaping and nonlinear frequency-to-time mapping is proposed and experimentally demonstrated. In the proposed approach, the optical power spectrum of an ultrashort pulse from a femtosecond pulsed laser is shaped by a two-tap Sagnac loop filter that has a sinusoidal frequency response. The spectrum-shaped optical pulse is then sent to a nonlinearly chirped fiber Bragg grating (NL-CFBG) with a tunable nonlinear group delay to serve as a high-order dispersive device to perform the nonlinear frequency-to-time mapping. A chirped electrical pulse with a high central frequency and large chirp rate is then generated at the output of a high-speed photodetector. The NL-CFBG used in the proposed system is produced from a regular linearly chirped fiber Bragg grating based on strain-gradient beam tuning. A detailed theoretical analysis on the chirped pulse generation is developed, which is verified by numerical simulations and experiments. Millimeter-wave pulses with a central frequency of around 35 GHz and instantaneous frequency chirp rates of 0.053 and 0.074 GHz/ps are experimentally generated.

Item Type: Article
Uncontrolled keywords: INSPEC: CONTROLLED INDEXING Bragg gratings chirp modulation laser tuning microwave photonics millimetre wave generation optical filters optical pulse generation optical pulse shaping photodetectors INSPEC: NON CONTROLLED INDEXING chirped millimeter-wave pulses chirped pulse generation femtosecond pulsed laser frequency 35 GHz high-order dispersive device high-speed photodetector nonlinear frequency-to-time mapping nonlinearly chirped fiber Bragg grating optical power spectrum photonic generation sinusoidal frequency response spectral shaping strain-gradient beam tuning tunable nonlinear group delay two-tap Sagnac loop filter AUTHOR KEYWORDS Chirped pulse generation chromatic dispersion frequency-to-time mapping microwave photonics nonlinearly chirped fiber Bragg grating (NL-CFBG) pulse compression radar IEEE TERMS Chirp Fiber nonlinear optics Frequency High speed optical techniques Nonlinear optics Optical filters Optical pulse generation Optical pulse shaping Pulse generation Ultrafast optics
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Faculties > Sciences > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: Tina Thompson
Date Deposited: 28 Oct 2013 11:50 UTC
Last Modified: 28 Oct 2013 11:50 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/35697 (The current URI for this page, for reference purposes)
  • Depositors only (login required):