High-resolution 3D coherent laser radar imaging

Krause, Brian W.; Gatt, Philip; Embry, Carl; Buck, J. R.

doi:10.1117/12.719483

Cited by 15 publications

(4 citation statements)

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“…The applications of the all-solid-state single-longitudinal-mode laser aimed at a 1.6 μm eye-safe waveband are mainly focused on the coherent Doppler wind LIDAR [1][2][3] , coherent imaging systems [4] , and so on. Recently, many methods have been used to achieve the 1.6 μm single-longitudinal-mode (SLM) lasers with Er:YAG crystal, such as the twisted-mode cavity [5] , the non-planar ring oscillator (NPRO) [6] , the unidirectional operation of the ring cavity [7,8] , and the intracavity Fabry-Perot etalons [9,10] .…”

Section: Introductionmentioning

confidence: 99%

2.32 W anti-misaligned Er:LuAG single-longitudinal-mode laser in the double corner-cube-retroreflector resonator and MOPA system

Fan,

Ju,

Jiang

et al. 2024

中国光学快报

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We demonstrate a high power, Er:LuAG single-longitudinal-mode laser in an anti-misaligned resonator. Based on the Faraday effect, a 1.61 W single-longitudinal-mode (SLM) laser is obtained with the double corner-cube-retroreflector (CCR) structure, and the tunable wavelength is 1649.2-1650.3 nm. Additionally, we investigate the anti-misalignment characteristics when the CCR moves and rotates along the optical axis. Furthermore, by utilizing the Er:LuAG amplifier, the maximum 2.32 W single-longitudinal-mode laser at 1649.6 nm is achieved. The beam quality factors M 2 of the 2.32 W Er:LuAG single-longitudinal-mode laser are 1.23 and 1.25 along the horizontal (x) and vertical (y) directions, respectively.

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Section: Introductionmentioning

confidence: 99%

2.32 W anti-misaligned Er:LuAG single-longitudinal-mode laser in the double corner-cube-retroreflector resonator and MOPA system

Fan,

Ju,

Jiang

et al. 2024

中国光学快报

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“…Optical frequency domain reflectometry (OFDR) distributed backscattering interrogator, on account of the advantages including high spatial resolution, high sensitivity and dead-zone free interrogation, has attracted many attentions in fields of such as optical communication network monitoring [1], imaging [2], [3], and distributed sensing [4], [5]. Principally, the measurement range is mainly determined by the coherence of the probe laser while the spatial resolution is inversely proportional to the sweep range and is also theoretically dictated by the sweep nonlinearity.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Range Enhanced Optical Frequency Domain Reflectometry Using Dual-Loop Composite Optical Phase-Locking

et al. 2021

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We report on a dynamic range enhanced optical frequency domain reflectometry distributed backscattering interrogator based on dual-loop composite optical phase-locked loop (OPLL). Exploiting simultaneously an acousto-optic frequency shifter based an external modulation loop and a piezo based direct modulation loop, the proposed composite OPLL allows offering a larger loop bandwidth and gain, permitting a more efficient coherence enhancement as well as sweep linearization. A high fidelity frequency sweep of ~8.2 GHz at 164 GHz/s sweep rate is generated with a peak-to-peak frequency error as low as ~120 kHz. It leads to a dynamic range enhancement of more than 3 dB for the measured power loss compared to the case when only piezo loop is applied. This corresponds to ~15 km extension for the measurement range of Rayleigh backscattering without any spatial resolution penalties. Fourier transform-limited spatial resolution has been demonstrated at a range window more than about 28 times of the intrinsic coherence length of the adopted fiber laser. The proposed method provides a straightforward optimization of the real-time sweep control and is expected to be a useful tool in industrial and commercial applications.

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“…Eye-safe solid-state laser sources generating radiation in the range of 1.5-1.6 µm have numerous applications in many fields, such as satellite communication, coherent Doppler wind lidars, and atmospheric sensing [1][2][3][4][5]. Research of single frequency Er:YAG lasers have been reported in recent years [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Fiber-bulk hybrid Er:YAG laser with single frequency output at the wavelengths of 1620 nm and 1656 nm

Shi

Gao

et al. 2019

Laser Phys. Lett.

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A fiber-bulk hybrid Er:YAG single frequency laser at the wavelengths of 1620 nm and 1656 nm is demonstrated. The laser is pumped by a 1532 nm Er,Yb fiber laser. Two intra-cavity etalons are utilized to realize the single frequency operation. The laser achieved up to 478 mW and 276 mW single-longitudinal-mode output at 1620 nm and 1656 nm, respectively. To the best of our knowledge, this is the first time a continuous single-longitudinal-mode laser output at 1620 nm and 1656 nm in a Er:YAG laser has been achieved.

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High-resolution 3D coherent laser radar imaging

Cited by 15 publications

References 0 publications

2.32 W anti-misaligned Er:LuAG single-longitudinal-mode laser in the double corner-cube-retroreflector resonator and MOPA system

2.32 W anti-misaligned Er:LuAG single-longitudinal-mode laser in the double corner-cube-retroreflector resonator and MOPA system

Dynamic Range Enhanced Optical Frequency Domain Reflectometry Using Dual-Loop Composite Optical Phase-Locking

Fiber-bulk hybrid Er:YAG laser with single frequency output at the wavelengths of 1620 nm and 1656 nm

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