Electro-optic sampling of free-running microwave PECL signals by using frequency-synchronized and delay-time tunable laser sources

Gong-Ru Lin; Shr-Hsiung Hung

doi:10.1117/12.447102

30 October 2001 Electro-optic sampling of free-running microwave PECL signals by using frequency-synchronized and delay-time tunable laser sources

Gong-Ru Lin, Shr-Hsiung Hung

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Proceedings Volume 4598, Photonics Technology in the 21st Century; (2001) https://doi.org/10.1117/12.447102
Event: International Symposium on Photonics and Applications, 2001, Singapore, Singapore

Abstract

We demonstrate a novel delay-line-free electro-optic sampling system by using a delay-time shifter which is modified from a microwave phase-locked loop. The ultrafast laser is inherently integrated with an electronic phase shifter which is modified from a microwave phase-locked loop. The voltage-controlled phase-shift as well as time- delay of the optical pulse is linear in the tuning of up to 1.9 period. The waveform sampling of the positive ECL signals generated from microwave frequency divider by using this system is demonstrated. The sampling results are compared with the same signals measured by conventional sampling scope. The distorted waveform of the ECL signal frequency-prescaled from microwave oscillator operated at high output level is observed. The divisor of the frequency presclar is found to vary from 2 to 5 at input power of less than -14DBm.

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Gong-Ru Lin and Shr-Hsiung Hung "Electro-optic sampling of free-running microwave PECL signals by using frequency-synchronized and delay-time tunable laser sources", Proc. SPIE 4598, Photonics Technology in the 21st Century, (30 October 2001); https://doi.org/10.1117/12.447102

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KEYWORDS

Microwave radiation

Clocks

Electro optics

Distortion

Oscillators

Phase shifts

Signal generators

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