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Non-diffracting and self-accelerating Bessel beams with on-demand tailored intensity profiles along arbitrary trajectories

期刊: OPTICS LETTERS, 2021; 46 (7)

Owing to their robustness against diffraction, Bessel beams (BBs) offer special advantages in various applications. To enhance their applicability, we......

Analog-digital hybrid chaos-based long-haul coherent optical secure communication

期刊: OPTICS LETTERS, 2021; 46 (7)

We propose and numerically investigate a chaotic optical coherent secure communication scheme, which supports long-haul secure transmission for signal......

Can amplified spontaneous emission produce intense laser guide stars for adaptive optics?

期刊: OPTICS LETTERS, 2021; 46 (8)

Adaptive optics is a key technology for ground-based optical and infrared astronomy, providing high angular resolution and sensitivity. Systems employ......

Generation of few-cycle pulses from a mode-locked Tm-doped fiber laser

期刊: OPTICS LETTERS, 2021; 46 (10)

We report a compact, self-starting dispersion-managed mode-locked thulium-doped fiber oscillator that delivers 2.6 nJ pulses at 2 mu m with a repetiti......

High-sensitivity special open-cavity Mach-Zehnder structure for salinity measurement based on etched double-side hole fiber

期刊: OPTICS LETTERS, 2021; 46 (11)

A special open-cavity Mach-Zehnder salinity sensor is presented and verified in this Letter, which has obvious advantages in salinity sensitivity and ......

Visualizing and simplifying convolutional recurrent autoencoder for mismatch compensation of channel-interleaved photonic analog-to-digital converter

期刊: OPTICS LETTERS, 2021; 46 (13)

Deep learning (DL) has been used to successfully solve numerous problems and challenges in a wide range of fields. The architecture of DL is complex a......

Sub-bandgap absorption and photo-response of molybdenum heavily doped black silicon fabricated by a femtosecond laser

期刊: OPTICS LETTERS, 2021; 46 (13)

Molybdenum (Mo)-doped black silicon (Si) is obtained. by using femtosecond. laser irradiation. The concentration of Mo atoms at the depth from 10 to 2......

Imaging spectrometer with single component of freeform concave grating

期刊: OPTICS LETTERS, 2021; 46 (14)

In this Letter, an imaging spectrometer in which a freeform concave grating is the only optical component in the system is introduced. The degrees of ......

Mode converter with C plus L band coverage based on the femtosecond laser inscribed long period fiber grating

期刊: OPTICS LETTERS, 2021; 46 (14)

The mode converter (MC) is one of the key components for mode division multiplexing (MDM). Here, we experimentally demonstrate an all-fiber long perio......

Geometric shaping optimization of 64-APSK constellation in discrete nonlinear frequency division multiplexing systems

期刊: OPTICS LETTERS, 2021; 46 (14)

We experimentally demonstrated a geometric shaped (GS) 64-ary amplitude phase shift keying (64-APSK) eigenvalue transmission. The signal is modulated ......

Generation of optical vortex lattices by a coherent beam combining system

期刊: OPTICS LETTERS, 2021; 46 (15)

Owing to the unique features in intensity and phase structures, optical vortex lattices (OVLs) have attracted intensive attention and promoted various......

Unsupervised learning for hyperspectral recovery based on a single RGB image

期刊: OPTICS LETTERS, 2021; 46 (16)

Hyperspectral imagery often suffers from the degradation of spatial, spectral, or temporal resolution due to the limitations of hyperspectral imaging ......

Raman enhancement mechanism and experiments of cavity-enhanced AgNP decorated tapered fiber sensor

期刊: OPTICS LETTERS, 2021; 46 (17)

A Raman sensor based on a cavity-enhanced Ag nanoparticle (AgNP) decorated tapered fiber is proposed. Its Raman enhancements are mainly caused by the ......

Achieving high-performance in situ fabricated FAPbBr(3) and electroluminescence

期刊: OPTICS LETTERS, 2021; 46 (17)

Currently, metal halide perovskite films still encounter the issues of inferior film quality and interfacial electrical properties when they were cons......

High-performance photonic spin Hall effect in anisotropic epsilon-near-zero metamaterials

期刊: OPTICS LETTERS, 2021; 46 (17)

A high-performance photonic spin Hall effect is demonstrated in an anisotropic epsilon-near-zero (ENZ) metamaterial based on the wave-vector-varying P......

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