Research on Coherent Laser Warning Receiver Based Sinusoidal Transmission Grating Diffraction

Zhang, J L; Er-ming, Tian; Wang, Z B

doi:10.1088/1742-6596/48/1/152

Cited by 6 publications

(8 citation statements)

References 1 publication

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“…well defined narrow peaks in a dispersed spectrum, requires a dispersal system typically a diffraction grating and a detector array. Recent developments have used a sinusoidal grating to diffract incoming laser light into 3 orders (0, ±1) [9,10]. The direction can be inferred from the position of the central zero order, and the wavelength inferred from the separation of the other orders (see also references in discussion) .…”

Section: Spectroscopic Detectionmentioning

confidence: 99%

Laser detection utilizing coherence

Benton

Zandi

Sugden

2019

Technologies for Optical Countermeasures XVI

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Section: Spectroscopic Detectionmentioning

confidence: 99%

Laser detection utilizing coherence

Benton

Zandi

Sugden

2019

Technologies for Optical Countermeasures XVI

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“…As a result, a DMD can be used to discriminate between laser and non-laser radiation. Consequently, DMDs are potential components for use within laser warning receiver (LWR) technology alongside gratings, 10 , 11 interferometers, 12 , 13 and cameras 14 . Partanen et al 15 .…”

Section: Introductionmentioning

confidence: 99%

Laser beam wavelength determination algorithm using a digital micromirror device

2023

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An approach for wavelength characterization whereby dynamic Fresnel zone plate (FZP) patterns are written to a digital micromirror device (DMD) and used to focus incoming light onto a camera is proposed. The incoming wavelength is then assessed by scanning the focal length. Rectangular basis Zernike modes are implemented to match the rectangular geometry of the DMD, we believe for the first time. A procedure is developed to correct for inherent aberrations of the optical system by adjusting the Zernike mode amplitudes, thus improving focal spot quality. The aberration corrected FZPs are used to assess the focusing conditions needed for four lasers of different visible wavelengths ranging from blue (405 nm) to near infrared (760 nm). The system is able to produce focused beams with a width of twice the diffraction limit and achieve a wavelength resolution of 3 nm. The operational wavelength of the system is ultimately limited by the spectral bandwidth of the detector.

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“…9 Spectroscopic systems typically use dispersion with a diffraction grating and a detector array. 10,11 Discrimination based on coherence detection is the main subject of this paper.…”

Section: Introductionmentioning

confidence: 99%

Laser detection using liquid crystal polarization modulators

Benton

2020

Opt. Eng.

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Lasers can be identified by their relatively long coherence lengths using interferometry. A Mach-Zehnder interferometer incorporating liquid crystal polarization modulators is demonstrated as a means of low-cost, robust laser detection. Temporal modulations, as a signature of coherence, can be induced by modulating polarization changes in liquid crystal modulators using low voltages. Sensitivities of <10 nW can be achieved. The suitability as a means of laser detection is discussed.

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Research on Coherent Laser Warning Receiver Based Sinusoidal Transmission Grating Diffraction

Cited by 6 publications

References 1 publication

Laser detection utilizing coherence

Laser detection utilizing coherence

Laser beam wavelength determination algorithm using a digital micromirror device

Laser detection using liquid crystal polarization modulators

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