Underwater spatially, spectrally, and temporally resolved optical monitoring of aquatic fauna

Duan, Zheng; Yuan, Ye; Lu, Junchen; Wang, J. L.; Li, Y.; Svanberg, Sune; Zhao, Guangyu

doi:10.1364/oe.383061

Cited by 21 publications

(7 citation statements)

References 26 publications

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“…While there is room for improvement in each of these segments, the device community has an interest to develop visible lasers into photonic integrated circuits [254,[392][393][394]. Heterogeneous integration of blue lasers with visible waveguides is an area of opportunity for topics of current interest such as beam steering for displays [395], optogenetics [396], and underwater applications where visible light exhibits the highest penetration [397]. Similarly, visible-light photonic integrated circuits can benefit from integrated DFB gratings, multiple section design including photodetectors, modulators, and amplifiers, and visiblelight waveguide development [398].…”

Section: Discussionmentioning

confidence: 99%

Group-III-nitride and halide-perovskite semiconductor gain media for amplified spontaneous emission and lasing applications

Ng¹,

Holguín‐Lerma²,

Kang³

et al. 2021

J. Phys. D: Appl. Phys.

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Group-III-nitride optical devices are conventionally important for displays and solid-state lighting, and recently have garnered much interest in the field of visible-light communication. While visible-light laser technology has become mature, developing a range of compact, small footprint, high optical power components for the green-yellow gap wavelengths still requires material development and device design breakthroughs, as well as hybrid integration of materials to overcome the limitations of conventional approaches. The present review focuses on the development of laser and amplified spontaneous emission (ASE) devices in the visible wavelength regime using primarily group-III-nitride and halide-perovskite semiconductors, which are at disparate stages of maturity. While the former is well established in the violet-blue-green operating wavelength regime, the latter, which is capable of solution-based processing and wavelength-tunability in the green-yellow-red regime, promises easy heterogeneous integration to form a new class of hybrid semiconductor light emitters. Prospects for the use of perovskite in ASE and lasing applications are discussed in the context of facile fabrication techniques and promising wavelength-tunable light-emitting device applications, as well as the potential integration with group-III-nitride contact and distributed Bragg reflector layers, which is promising as a future research direction. The absence of lattice-matching limitations, and the presence of direct bandgaps and excellent carrier transport in halide-perovskite semiconductors, are both encouraging and thought-provoking for device researchers who seek to explore new possibilities either experimentally or theoretically. These

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Section: Discussionmentioning

confidence: 99%

Group-III-nitride and halide-perovskite semiconductor gain media for amplified spontaneous emission and lasing applications

Ng¹,

Holguín‐Lerma²,

Kang³

et al. 2021

J. Phys. D: Appl. Phys.

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“…To combine the two distances into a single measure D 0 , it is necessary to normalize color proximity and spatial proximity by their respective maximum distances within a cluster, N c and N s . The maximum color distance N C could be a fixed constant (value range [1,40], generally 10): E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 0 4 ; 1 1 4 ; 3 1 5…”

Section: Super-pixel Segmentationmentioning

confidence: 99%

“…Underwater vision has broad application prospects in the tasks of marine science and engineering, such as in underwater monitoring, 1 , 2 underwater detection, 3 , 4 underwater robots, 5 , 6 and underwater navigation 7 , 8 . Clear underwater images or videos are significant for underwater tasks 9 .…”

Section: Introductionmentioning

confidence: 99%

Underwater image restoration based on second-order statistical characteristics

et al. 2023

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Underwater image restoration is of great significance to underwater vision operation. We propose an underwater image restoration method based on the independent color channel of a single image. In this method, the relationship between the transmittance parameters and the second-order statistics of the scattered light underwater is established through a multi-layer continuous model of the water. First, the region with approximate depth is obtained by super-pixel segmentation, then the sub-color channel statistical calculation is carried out for each super-pixel independently, and finally the transmittance of each color channel is estimated combined with the relational expression. Experimental results show that this method has better effect on color fidelity of underwater image restoration.

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“…To demonstrate the wavelength dependence of satelliteto-submarine quantum communication, we estimate the parameters of the trans-media channels, involving the daytime atmosphere, sea surface and seawater, and find that the shortwave infrared performs well in the above-mentioned channels, which corresponds to the wavelength range of 400-500 nm. [18,19] For more challenging free-space channels, we employ the aggressive spectral filtering techniques (high-order adaptive optics, AO) that allow the use of very tight spatial filtering and relax other filtering requirements. [20,21] In order to evaluate the feasibility of satellite-to-submarine CVKQD, we consider the secret key rate as the performance metric.…”

Section: Introductionmentioning

confidence: 99%

Short-wave infrared continuous-variable quantum key distribution over satellite-to-submarine channels

Peng¹,

Liao²,

Zhong³

et al. 2022

Chinese Phys. B

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The trans-media transmission of quantum pulse is one of means of free-space transmission which can be applied in continuous-variable quantum key distribution (CVQKD) system. In traditional implementations for atmospheric channels, the 1500-to-1600-nm pulse is regarded as an ideal quantum pulse carrier. Whereas, the underwater transmission of this pulses tends to suffer from severe attenuation, which inevitably deteriorates the security of the whole CVQKD system. In this paper, we propose an alternative scheme for implementations of CVQKD over satellite-to-submarine channels. We estimate the parameters of the trans-media channels, involving atmosphere, sea surface and seawater and find that the short-wave infrared performs well in the above channels. The 450 nm pulse is used for generations of quantum signal carriers to accomplish quantum communications through atmosphere, sea surface and seawater channels. Numerical simulations show that the proposed scheme can achieve the transmission distance of 600 km. In addition, we demonstrate that non-Gaussian operations can further lengthen its maximal transmission distance, which contributes to the establishment of practical global quantum networks.

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Underwater spatially, spectrally, and temporally resolved optical monitoring of aquatic fauna

Cited by 21 publications

References 26 publications

Group-III-nitride and halide-perovskite semiconductor gain media for amplified spontaneous emission and lasing applications

Group-III-nitride and halide-perovskite semiconductor gain media for amplified spontaneous emission and lasing applications

Underwater image restoration based on second-order statistical characteristics

Short-wave infrared continuous-variable quantum key distribution over satellite-to-submarine channels

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