Abstract
The timing jitter performance of a 5 GHz quantum dot passively mode-locked laser is investigated at different harmonics in the RF spectrum. The necessity of measuring the phase noise at relatively large harmonic numbers is motivated experimentally in the context of determining the corner frequency, its correlation to the RF linewidth, and the related white noise plateau level. The single-sideband phase noise with an integrated timing jitter of 211 fs (4-80 MHz) is reported. An all-microwave technique has been used to determine a pulse-to-pulse rms timing jitter of 96 fs/cycle. This low timing jitter value makes the chip-scale quantum dot mode-locked laser an attractive source for low noise applications such as optical clocking and sampling.
Highlights
Effective and compact semiconductor passively mode-locked lasers (MLLs) have been attracted plenty of attention due to the demand of ultra-low phase noise optoelectronic oscillators for optical signal processing applications [1,2,3,4]
The timing jitter performance of a 5 GHz quantum dot passively mode-locked laser is investigated at different harmonics in the RF spectrum
An allmicrowave technique has been used to determine a pulse-to-pulse rms timing jitter of 96 fs/cycle. This low timing jitter value makes the chip-scale quantum dot mode-locked laser an attractive source for low noise applications such as optical clocking and sampling
Summary
Effective and compact semiconductor passively mode-locked lasers (MLLs) have been attracted plenty of attention due to the demand of ultra-low phase noise optoelectronic oscillators for optical signal processing applications [1,2,3,4]. These applications include high speed optical sampling, all-optical clock recovery and clock distribution. We experimentally characterize the corner frequency and low-frequency plateau level in the phase noise of a nonstationary monolithic two-section passive QD MLL operating with a nominal 5 GHz repetition rate. The device exhibits a state-of-art integrated timing jitter value of 211 fs (4-80 MHz) and a pulse-to-pulse root mean square (rms) timing jitter of 96 fs/cycle for a 5 GHz passive QD MLL
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