Octave-Spanning Optical Frequency Comb Generation Using a Directly-Modulated Microlaser Source

Wu, Jiawei; Guo, Xiaohui; Jiao, Yadong; Zhang, Xucheng; Wang, Ting; Yang, Yue-De; Xiao, Jin-Long; Zhang, Daming; Qin, Guanshi; Huang, Yong‐Zhen

doi:10.1109/jlt.2022.3179828

Cited by 6 publications

(1 citation statement)

References 43 publications

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“…PLC technology has made significant advancements in the field of optical communication and is widely employed in splitters, tunable optical attenuators, optical switches, and optical combs. [27][28][29][30][31][32] To assess the sensing performance of a magnetometer array using the PLC technology, we propose the fabrication of a compact PLC waveguide splitter operating at 795 nm using the ion-exchange technology, [33] which ensures low light loss and high uniformity for the magnetometer array. Our design incorporates seven cascading inclined y-branch waveguides interconnected by waveguides with different curvatures.…”

Section: Atomic Magnetometer Array Configuration Using the Planar Lig...mentioning

confidence: 99%

A Miniaturized Spin‐Exchange Relaxation‐Free Atomic Magnetometer Array Based on a 1 × 8 Planar Lightwave Circuit Waveguide Splitter

Chai

Sun

et al. 2023

Adv Quantum Tech

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Using spin‐exchange relaxation‐free (SERF) atomic magnetometer array (AMA) in magnetocardiography and magnetoencephalography has presented a challenge in reducing its packing volume for integrated instrumentation and convenient maintenance. This study presents a novel, space‐saving SERF AMA based on an 8‐channel planar lightwave circuit (PLC) waveguide splitter with a compact footprint of 26 × 2.5 mm2. The PLC splitting configuration allows the synchronization of the pump for a multisensor array, resulting in highly consistent performance among the sensors, with an impressive ultrahigh sensitivity of 34 fT Hz−1/2 within a measurement bandwidth of 105 Hz. The PLC splitting method shows great promise in expanding the channel capacity of small‐scale SERF AMAs, offering a cost‐effective method for high‐resolution medical diagnoses through functional magnetic imaging of humans. In addition, this method is expected to find applications in fields such as electromagnetic induction imaging, biological magnetism, and geomagnetic observation.

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Section: Atomic Magnetometer Array Configuration Using the Planar Lig...mentioning

confidence: 99%

A Miniaturized Spin‐Exchange Relaxation‐Free Atomic Magnetometer Array Based on a 1 × 8 Planar Lightwave Circuit Waveguide Splitter

Chai

Sun

et al. 2023

Adv Quantum Tech

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Spectrally Programmable Optical Frequency Comb Generation

Liu,

Du,

et al. 2024

ACS Photonics

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Optical frequency combs (OFCs) are critical components in several fields, such as optical communications, microwave photonics, ranging, atomic clocks, and photonic neural networks, which meet diverse application requirements through precise spectral manipulations. Conventional OFC spectral manipulation methods use Fourier transform pulse shapers for postprocessing. However, they face constraints in terms of spectral resolution and operational bandwidth. In this study, a deeplearning-assisted approach is introduced to enable efficient spectral shaping of OFCs through nonlinear broadening, achieving broader spectral shaping by controlling a narrower-bandwidth seed comb. By training a convolutional neural network, we model complex nonlinear interactions within a highly nonlinear fiber to predict and control the spectral output of a broadened comb. Experimental validation confirms the system's ability to generate, with high precision, diverse spectral shapes such as Gaussian, parabolic, Cauchy, Laplace, and Gaussian mixture models within seconds, with a relative error of 10 −1 −10 −2 . Our study presents a flexible, rapid, and efficient method for the spectral shaping of OFCs using deep learning, marking a substantial advancement in the programmability and utility of OFC technologies.

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Optical frequency comb generation based on spectral broadening of a phase locked dual-wavelength microcavity laser

Wang

Yang

et al. 2023

J. Phys. D: Appl. Phys.

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A highly coherent optical frequency comb (OFC) based on spectral broadening of a phase-locked dual-wavelength microcavity laser is presented. By directly modulating the microcavity laser to generate multiple sidebands, the cross-injection locking of the dual modes is achieved and the beat-signal linewidth is improved from 13.5 MHz to less than 100 Hz. Subsequently, 21 flat comb teeth in a ±3 dB power variation are achieved by combining a phase modulator. Finally, an OFC with a bandwidth of 16 nm is successfully realized by narrowing the optical pulse and spectral broadening in a commercial nonlinear optical fiber. The repetition rate has a low phase noise of -102 dBc/Hz at 10 kHz offset, demonstrating the generated OFC has a high degree of coherence.

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Octave-Spanning Optical Frequency Comb Generation Using a Directly-Modulated Microlaser Source

Cited by 6 publications

References 43 publications

A Miniaturized Spin‐Exchange Relaxation‐Free Atomic Magnetometer Array Based on a 1 × 8 Planar Lightwave Circuit Waveguide Splitter

A Miniaturized Spin‐Exchange Relaxation‐Free Atomic Magnetometer Array Based on a 1 × 8 Planar Lightwave Circuit Waveguide Splitter

Spectrally Programmable Optical Frequency Comb Generation

Optical frequency comb generation based on spectral broadening of a phase locked dual-wavelength microcavity laser

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