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Broadband Transient Waveform Digitizer Based on Photonic Time Stretch

A broadband digitizer is proposed and experimentally demonstrated based on photonic time stretch (PTS). In this scheme, a complementary single-sideband modulation architecture in combination with successive digital difference operation and phase compensation are employed to simultaneously eliminate dispersion-induced power fading problem, remove dynamic pulse envelope, suppress modulation nonlinearity impairment and maintain broadband waveform fidelity. In the proof-of-concept experiment, a PTS preprocessor with a stretch factor of 8.77 and a time window of 1.8 ns is realized, where the maximum power degradation in the frequency range up to 25 GHz is 5 dB. By using this preprocessor, single-tone microwave signals in the frequency range of 2 to 25 GHz are digitized with effective number of bits larger than 3.4 bits. For single-tone input microwave signals at 12 and 15 GHz, the 2 nd -order harmonic suppression ratios are enhanced by 11.51 and 16.86 dB, respectively. For a two-tone microwave signal at 8 and 10 GHz, the synthetic waveform fidelity after time stretch is maintained by carrying out phase compensation.

Ketersediaan

Informasi Detail

Judul Seri

JOURNAL OF LIGHTWAVE TECHNOLOGY; Vol.39 No.9 May 1 2021

No. Panggil

-

Penerbit

: .,

Deskripsi Fisik

p. 2880 - 2887

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

SINGLE-SIDEBAND MODULATION
ANALOG-TO-DIGITAL CONVERTOR
DISPERSION-INDUCED POWER PENALTY
PHOTONIC TIME STRETCH

Info Detail Spesifik

DOI: 10.1109/JLT.2021.3061511

Pernyataan Tanggungjawab

Yaowen Zhang, Rongting Jin, Di Peng, Weiqiang Lyu, Zhenwei Fu, Zhiyao Zhang, Shangjian Zhang, Heping Li, Yong Liu

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