Modeling of On-Chip Optical Nonreciprocity with an  Active Microcavity

Wen, Jianming; Jiang, Xiaoshun; Zhang, Mengzhen; Jiang, Liang; Hua, Shiyue; Wu, Hongya; Yang, Chao; Xiao, Min

doi:10.3390/photonics2020498

Cited by 10 publications

(12 citation statements)

References 37 publications

(46 reference statements)

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“…In comparison with previous works131415161718192021222324 utilizing nonlinearities, our framework shows explicitly remarkable isolating performance in suppressing the transmission of backward-propagating noise with signal fields launched from both directions simultaneously. Unlike prior work172123, our scheme achieves appreciable isolation functionality with only one coupling fibre, a significant non-trivial step forward.…”

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confidence: 68%

“…For the experiment on investigating non-reciprocal transmission by launching the signal either in the forward configuration or the backward as done in previous research141516171819202122232425, on the other hand, one only needs to switch off one path of the signal propagation through a variable optical attenuator (VOA 4 or VOA3).…”

Section: Methodsmentioning

confidence: 99%

“…In contrast to linear isolators, considerable enthusiasm has been devoted to breaking Lorentz reciprocity with use of various nonlinearities. Among these, to name a few, non-reciprocal light transmission has recently been demonstrated with second-order nonlinearity1314, Kerr or Kerr-type nonlinearities1516, gain/absorption saturation171819, Raman amplification20, stimulated Brillouin scattering21, Bragg scattering22, thermo-optic effects23 and with opto-acoustic effects24.…”

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confidence: 99%

“…Of these nonlinear means131415161718192021222324, asymmetric transmission contrast is typically demonstrated when a wave is injected in either forward or backward direction but never both. The lack of an experiment on the simultaneous presence of waves from both directions causes people to question whether these nonlinear isolators could be actually capable of providing complete isolation under practical operating conditions.…”

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confidence: 99%

See 3 more Smart Citations

Demonstration of a chip-based optical isolator with parametric amplification

Hua¹,

Wen²,

Jiang³

et al. 2016

Nat Commun

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119

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Despite being fundamentally challenging in integrated (nano)photonics, achieving chip-based light non-reciprocity becomes increasingly urgent in signal processing and optical communications. Because of material incompatibilities in conventional approaches based on the Faraday effect, alternative solutions have resorted to nonlinear processes to obtain one-way transmission. However, dynamic reciprocity in a recent theoretical analysis has pinned down the functionalities of these nonlinear isolators. To bypass such dynamic reciprocity, we here demonstrate an optical isolator on a silicon chip enforced by phase-matched parametric amplification in four-wave mixing. Using a high-Q microtoroid resonator, we realize highly non-reciprocal transport at the 1,550 nm wavelength when waves are injected from both directions in two different operating configurations. Our design, compatible with current complementary metal-oxide-semiconductor (CMOS) techniques, yields convincing isolation performance with sufficiently low insertion loss for a wide range of input power levels. Moreover, our work demonstrates the possibility of designing chip-based magnetic-free optical isolators for information processing and laser protection.

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confidence: 68%

Section: Methodsmentioning

confidence: 99%

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confidence: 99%

mentioning

confidence: 99%

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Demonstration of a chip-based optical isolator with parametric amplification

Hua¹,

Wen²,

Jiang³

et al. 2016

Nat Commun

Self Cite

119

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“…In the steady-state approximation, for the forward and backward propagation configurations (Fig. 1a,b), the output signal at ports 2 (1) and 4 (3) are, respectively, represented in terms of the signal field amplitude a F , B inside the cavity for the forward (backward) configuration34,…”

Section: Resultsmentioning

confidence: 99%

On-Chip Optical Nonreciprocity Using an Active Microcavity

Jiang

Yang

et al. 2016

Sci Rep

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Optically nonreciprocal devices provide critical functionalities such as light isolation and circulation in integrated photonic circuits for optical communications and information processing, but have been difficult to achieve. By exploring gain-saturation nonlinearity, we demonstrate on-chip optical nonreciprocity with excellent isolation performance within telecommunication wavelengths using only one toroid microcavity. Compatible with current complementary metal-oxide-semiconductor process, our compact and simple scheme works for a very wide range of input power levels from ~10 microwatts down to ~10 nanowatts, and exhibits remarkable properties of one-way light transport with sufficiently low insertion loss. These superior features make our device become a promising critical building block indispensable for future integrated nanophotonic networks.

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