Development of a novel laser system for the CZMIL lidar

Pierce, J.W.; Fuchs, Eran; Nelson, Spencer; Feygels, Viktor; Tuell, Grady

doi:10.1117/12.851933

Cited by 13 publications

(9 citation statements)

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“…Accordingly, the ALB data were collected using CZMIL (see the primary technical parameters in Table 1). The CZMIL system emits green (λ = 532 nm) and IR (λ = 1064 nm) laser pulses in a collinear manner [19]. The beam scanning pattern is circular with a fixed angle [30].…”

Section: Data Acquisitionmentioning

confidence: 99%

“…A detailed description of standardized coefficients theory is appended in Appendix A. The contribution of the surface layer SSC is the largest, followed by the beam scanning angle ϕ and ALB sensor height H. To accurately analyze the effects of the preceding parameters on NWSP, Equation (19) and these coefficients in the optimized NWSP model are used to reflect the relationships of ∆d varying with ϕ, H, and C. Figure 3 shows these relationships. Relative to the statistical relationship, the relationship between each parameter and ∆d in the optimized model is considerably clear.…”

Section: Construction and Optimization Of The Nwsp Modelmentioning

confidence: 99%

“…Upon optimization, the p-values of the remaining parameters in the optimized model are below α. Therefore, the parameters in Equation (19) are statistically significant and should be included in the model. To analyze the contribution of each parameter in the optimized NWSP model, the standardized coefficients β of each parameter in the model are calculated (see Table 5).…”

Section: Construction and Optimization Of The Nwsp Modelmentioning

confidence: 99%

“…To solve this problem, stepwise regression is adopted to optimize the model. Equation (19) shows the optimized NWSP model. Relative to Equation (4), the optimized model drops ϕ 2 and H, thereby indicating that the impact of the beam scanning angle ϕ on NWSP can be described through a simple linear function.…”

Section: Construction and Optimization Of The Nwsp Modelmentioning

confidence: 99%

“…Using the data of the remaining 1786 point pairs in the representative water areas, the comprehensive NWSP model shown in Equation (4) and optimized model shown in Equation (19) are evaluated. The Δd in each point pair can be obtained by considering the beam scanning angle, sensor height and surface layer SSC in the two models.…”

Section: Accuracy Analysis For the Nwsp Modelsmentioning

confidence: 99%

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Shallow Water Measurements Using a Single Green Laser Corrected by Building a Near Water Surface Penetration Model

Zhao

Zhang

et al. 2017

Remote Sensing

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Abstract:To reduce the size and cost of an integrated infrared (IR) and green airborne LiDAR bathymetry (ALB) system, and improve the accuracy of the green ALB system, this study proposes a method to accurately determine water surface and water bottom heights using a single green laser corrected by the near water surface penetration (NWSP) model. The factors that influence the NWSP of green laser are likewise analyzed. In addition, an NWSP modeling method is proposed to determine the relationship between NWSP and the suspended sediment concentration (SSC) of the surface layer, scanning angle of a laser beam and sensor height. The water surface and water bottom height models are deduced by considering NWSP and using only green laser based on the measurement principle of the IR laser and green laser, as well as employing the relationship between NWSP and the time delay of the surface return of the green laser. Lastly, these methods and models are applied to a practical ALB measurement. Standard deviations of 3.0, 5.3, and 1.3 cm are obtained by the NWSP, water-surface height, and water-bottom height models, respectively. Several beneficial conclusions and recommendations are drawn through the experiments and discussions.Keywords: airborne LiDAR bathymetry; near water surface penetration; water surface height; water bottom height; suspended sediment concentration of the surface layer

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Section: Data Acquisitionmentioning

confidence: 99%

Section: Construction and Optimization Of The Nwsp Modelmentioning

confidence: 99%

Section: Construction and Optimization Of The Nwsp Modelmentioning

confidence: 99%

Section: Construction and Optimization Of The Nwsp Modelmentioning

confidence: 99%

Section: Accuracy Analysis For the Nwsp Modelsmentioning

confidence: 99%

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Shallow Water Measurements Using a Single Green Laser Corrected by Building a Near Water Surface Penetration Model

Zhao

Zhang

et al. 2017

Remote Sensing

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Hollow‐Core Fiber: Breaking the Nonlinearity Limits of Silica Fiber in Long‐Distance Green Laser Pulse Delivery

Fu,

Davidson,

Mousavi

et al. 2024

Laser & Photonics Reviews

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Hollow‐core fiber (HCF), in which >99.99% of the light is guided in a central air (or vacuum) filled core, is a radically new fiber technology offering the potential to overcome the nonlinear limits associated with the delivery of high‐brightness laser pulses over long distances in conventional solid‐core fiber. Overcoming these limits is particularly challenging at visible wavelengths where the core sizes of single‐mode fibers (SMFs) are reduced. In this work, the delivery of near‐diffraction‐limited, kilowatt‐peak‐power, sub‐nanosecond laser pulses in the green wavelength range over hundred‐meter scale lengths of a hollow‐core anti‐resonant fiber (HC‐ARF) which offers broadband low‐loss guidance in the visible is experimentally demonstrated. Substantially reduced nonlinearity‐induced spectral broadening is observed relative to silica‐core SMF. The simulation further confirms that the broadening observed (in the HC‐ARF) is entirely due to the interaction of the light with the air in the core and thus can effectively be eliminated by evacuating the fiber. Moreover, access to lower‐loss is noted, and visible guiding HC‐ARFs (that are now becoming available) will improve the throughput efficiency and extend power delivery to kilometer distance scales. The results demonstrated here pave the way for future long‐distance HCF pulse delivery applications, such as remote industrial e‐mobility manufacturing.

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NWSP: A Novel Indicator for Ocean–Land Interface Extraction Using Bathymetric LiDAR

Zhao,

Xia,

Zhou

2024

IEEE J. Oceanic Eng.

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Development of a novel laser system for the CZMIL lidar

Cited by 13 publications

References 0 publications

Shallow Water Measurements Using a Single Green Laser Corrected by Building a Near Water Surface Penetration Model

Shallow Water Measurements Using a Single Green Laser Corrected by Building a Near Water Surface Penetration Model

Hollow‐Core Fiber: Breaking the Nonlinearity Limits of Silica Fiber in Long‐Distance Green Laser Pulse Delivery

NWSP: A Novel Indicator for Ocean–Land Interface Extraction Using Bathymetric LiDAR

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