Optical Injection Locking: From Principle to Applications

Liu, Zhixin; Slavı́k, Radan

doi:10.1109/jlt.2019.2945718

Cited by 151 publications

(81 citation statements)

References 124 publications

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“…The other approach for comb puri cation of optical injection locking (OIL), involves each comb line being injected into an individual slave laser so that the output frequency follows the line frequency. The approach can also support demultiplexing and ampli cation simultaneously by selecting the locking range to be smaller than the line spacing, so that only one line is ampli ed while the others are discarded [42]. With this principle, it is has been reported [55] that low per-tone power combs can be ampli ed and used in optical communications systems, achieving better performance than the 'demultiplexing and ampli cation' method [55].…”

Section: Discussionmentioning

confidence: 99%

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Frequency microcomb distillation for optical superchannel transmission

Prayoonyong

Boes

et al. 2021

Preprint

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Optical frequency combs potentially can provide a compact and efficient light source for multi-Terabit-per-second optical superchannels. However, as the bandwidth of these multi-wavelength light sources is increased, it can result in low per-line power. Optical amplifiers can be used to overcome power limitations, but the accompanying spontaneous optical noise can degrade performance in optical systems. To overcome this, we demonstrate wideband noise reduction for comb lines using a high-Q microring resonator whose resonances align with the comb lines. When applying the proposed distillation to a superchannel system at 18 Gbaud, with 64-QAM sub-channels in a > 10 Tb/s optical superchannel, we find that noise-corrupted comb lines can reduce the optical signal-to-noise ratio required for the comb by ~ 9 dB when used as optical carriers at the transmitter side, and by ~ 12 dB when used as a local oscillator at the receiver side. By filtering with a MRR, we eliminate this degradation in OSNR.

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Section: Discussionmentioning

confidence: 99%

“…There are a variety of approaches used to purify the ampli ed comb lines by reducing the optical noise, including techniques such as optical injection locking [42] and stimulated Brillouin scattering (SBS) [43], [44]. However, these approaches involve limitations due to size, power consumption, and/or a limited optical frequency range.…”

Section: Introductionmentioning

confidence: 99%

Frequency microcomb distillation for optical superchannel transmission

Prayoonyong

Boes

et al. 2021

Preprint

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“…5c, where by analyzing the beating signals of Alice's local light from the FM and Bob's transmitted light or Alice's reflected light, the phase drifts are compensated using the AOM. Another method of laser injection [80,81] was applied in [53]. Here the seed laser is set at Charlie, as shown in Fig.…”

Section: Laser Locking Techniquesmentioning

confidence: 99%

Recent Advances on Quantum Key Distribution Overcoming the Linear Secret Key Capacity Bound

2020

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A crucial goal for quantum key distribution (QKD) is to transmit unconditionally secure keys over long distances. Previous studies show that the key rate of point-to-point QKD is limited by a secret key rate capacity bound, and higher key rates would require quantum repeaters. In 2018, the seminal twin-field (TF) QKD protocol was proposed to provide a remarkable solution to overcoming the linear secret key capacity bound. This article presents an up-to-date survey on recent developments in this area, including the security proofs of phase-matching QKD and other TF-QKD type protocols, the theoretical examinations of these protocols under realistic conditions, and the recent experimental demonstrations.

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“…The high power pump is attenuated before being launched into the span to avoid nonlinear effects in the transmission fiber, i.e., FWM between pump, signal, and idler. The weak pump is used as the pilot to regenerate the high power pump required for phase-sensitive operation in the PSA through optical injection locking [31,32] at the pump recovery. At the PSA input, the signal and the idler symbols need to overlap temporally, which requires dispersion compensation.…”

Section: Phase-sensitive Parametric Optical Amplifiers and Nonlinearimentioning

confidence: 99%

Modulation format dependence on transmission reach in phase-sensitively amplified fiber links

Vijayan

Foo

et al. 2020

Opt. Express

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We quantify the maximum transmission reach for phase-insensitive amplifier (PIA) and phase-sensitive amplifier (PSA) links with different modulation formats and show that the maximum transmission reach increase (MTRI) when using PSAs compared to PIAs is enhanced for higher-order modulation formats. The higher-order modulation formats are more susceptible to smaller phase rotations from nonlinearities, and PSAs are efficient in mitigating these smaller phase distortions. Numerical simulations were performed for single-and multi-span PIA and PSA links with single and multiple wavelength channels. We obtain a significant enhancement in the MTRI with PSAs compared to PIAs when using higher-order modulation formats for both the single-and multi-channel systems in single-and multi-span links. We verify the enhancement with a single-span, single-channel system experiment. We also demonstrate, for the first time, a 64-QAM modulation format fiber transmission in phase-sensitively amplified link, with a 13.3-dB maximum allowable span loss increase compared to a phase-insensitively amplified link.

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Optical Injection Locking: From Principle to Applications

Cited by 151 publications

References 124 publications

Frequency microcomb distillation for optical superchannel transmission

Frequency microcomb distillation for optical superchannel transmission

Recent Advances on Quantum Key Distribution Overcoming the Linear Secret Key Capacity Bound

Modulation format dependence on transmission reach in phase-sensitively amplified fiber links

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