Chirped Microwave Pulse Generation Using a Photonic Microwave Delay-Line Filter With a Quadratic Phase Response

We propose an optical approach to generating chirped microwave pulses using a photonic microwave delay-line filter (PMDLF) with a quadratic phase response. If a chirp-free broadband microwave pulse is inputted into the filter, a chirped microwave pulse is generated thanks to the quadratic phase resp...

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Bibliographic Details
Published in:IEEE photonics technology letters 2009-05, Vol.21 (9), p.569-571
Main Authors: Yitang Dai, Yitang Dai, Jianping Yao, Jianping Yao
Format: Article
Language:English
Subjects:
Arbitrary waveform generation
Broadband
Chirp
chirped pulse generation
Delay
Equivalence
Fiber nonlinear optics
High speed optical techniques
Microwave filters
Microwave generation
microwave photonics
Microwaves
nonuniformly spaced sampling
Optical filters
Optical pulse generation
Optical pulse shaping
Photonics
Pulse generation
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Summary:We propose an optical approach to generating chirped microwave pulses using a photonic microwave delay-line filter (PMDLF) with a quadratic phase response. If a chirp-free broadband microwave pulse is inputted into the filter, a chirped microwave pulse is generated thanks to the quadratic phase response of the filter. To design a PMDLF with a quadratic phase response, complex tap coefficients are required, which is hard to implement in the optical domain. In this letter, a PMDLF with equivalent complex coefficients implemented based on a nonuniformly spaced delay-line structure is demonstrated. Since only positive coefficients are required, the filter is easy to implement. A design example is provided. A five-tap PMDLF to generate a chirped microwave pulse with a chirp rate of 13.2 GHz/ns is then experimentally demonstrated.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2009.2014966