A frequency matching algorithm is proposed to reduce the detection bandwidth of the dual-comb parallel FMCW LiDAR system. The detection bandwidth can be reduced by one order of magnitude, significantly saving the syst...
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The development of laser sources capable of automatically aligning with atomic spectral lines is crucial for the creation of plug-and-play atomic devices, such as optical clocks and atomic gravimeters, with an enhance...
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A frequency matching algorithm is proposed to reduce the detection bandwidth of the dual-comb parallel FMCW LiDAR system. The detection bandwidth can be reduced by one order of magnitude, significantly saving the syst...
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We demonstrate 1.0-Pb/s CPRI-equivalent rate fronthaul with 1024-QAM by using digital-analog radio-over-fiber and coherent detection based on modulator bias-induced residual carrier for phase tracking. The reach is ex...
We demonstrate 1.0-Pb/s CPRI-equivalent rate fronthaul with 1024-QAM by using digital-analog radio-over-fiber and coherent detection based on modulator bias-induced residual carrier for phase tracking. The reach is extended to 20-km SSMF with 4096-QAM and 80-km with 256-QAM, and laser linewidth can be relaxed to 3MHz.
The max-cut problem is one of the fundamental NP-hard problems in combinatorial optimization, which can describe the practical applications such as data clustering, machine scheduling, and image recognition. This prob...
The max-cut problem is one of the fundamental NP-hard problems in combinatorial optimization, which can describe the practical applications such as data clustering, machine scheduling, and image recognition. This problem can be formulated into an equivalent Ising model without local fields,
We proposed a scheme for realizing active Faraday optical frequency standards using diffuse laser cooling of alkali-metal atoms. A 1-m-long cold 87Rb atomic cloud was prepared within a φ 2 cm × l 1 m vacuum glas...
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Modulation transfer spectroscopy (MTS) is a widely adopted sub-Doppler spectroscopic technique used for laser stabilization. In conventional MTS, modulation of the pump light is transferred to the probe light within a...
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ISBN:
(数字)9798350371901
ISBN:
(纸本)9798350371918
Modulation transfer spectroscopy (MTS) is a widely adopted sub-Doppler spectroscopic technique used for laser stabilization. In conventional MTS, modulation of the pump light is transferred to the probe light within a single atomic transition. A high population of atoms in the ground state is essential for achieving a high signal-to-noise ratio in MTS. Consequently, traditional MTS cannot be effectively applied to atomic transitions between higher energy levels, where the population of atoms is significantly lower. This work proposes a novel approach to stabilize a 1529 nm laser using dual-wavelength MTS. In this scheme, the pump and probe lights are generated by separate lasers, allowing for the modulation transfer process to occur between a 780 nm laser and a 1529 nm laser. Specifically, a prestabilized and modulated 780 nm laser is used as the pump light to interact with atoms, while the 1529 nm laser acts as the probe light to generate the servo signal necessary for locking the 1529 nm laser. This technique is versatile and can be applied to various atomic ensembles, including potassium (K), cesium (Cs), and lithium (Li).
We demonstrated a digital frequency offset locking system based on long short-term memory (LSTM) neural network and locked two free-running lasers at 1550.12 nm with 291.25 MHz offset after transferring through a 1577...
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We demonstrate a femtosecond erbium-doped fiber laser operated at 895 MHz fundamental repetition rate by nonlinear polarization evolution (NPE). The laser delivers 150 mW of average output power and 79.5 fs pulse dura...
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