Quadrant photodetector sensitivity

Manojlović, Lazo M.

doi:10.1364/ao.50.003461

Cited by 42 publications

(14 citation statements)

References 9 publications

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“…[19]. Reference [18] derived an approximate form, not for the response, but for the sensitivity for the Gaussian beam. We obtained the corresponding response by straightforward integration.…”

Section: Numerical Resultsmentioning

confidence: 99%

Response of quadrant detectors to structured beams via convolution integrals

Narag

Hermosa

2017

J. Opt. Soc. Am. A

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We propose a new expression for the response of a quadrant detector using convolution integrals. This expression, exploiting the properties of the convolution, is easier to evaluate by hand. Computationally, it is also practicable to use since a large number of computer programs can evaluate convolutions right away. We use the new expression to obtain an analytical form of the response of a quadrant detector for a Gaussian beam and for Hermite-Gaussian beams in general. We compare this analytic expression for the response for the Gaussian beam with the approximations from previous studies and with the response obtained through simulations. From the response, we also obtained an analytical form for the sensitivity of the quadrant detector to a Gaussian beam. Lastly, we demonstrate the computational ease of using our new expression for the response by calculating the sensitivity of the quadrant detector to the Bessel beam.

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Section: Numerical Resultsmentioning

confidence: 99%

Response of quadrant detectors to structured beams via convolution integrals

Narag

Hermosa

2017

J. Opt. Soc. Am. A

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“…The task is to determine the laser beam tilt angle θ n = Δx/F that corresponds to the noise of the measurement setup. Using (8) and (9), one obtains…”

Section: The Laser Beam Slope Caused By the Measurement System Noisementioning

confidence: 99%

The sensitivity limitation by the recording ADC to Laser Fiducial Line and Precision Laser Inclinometer

Batusov

Budagov

Lyablin

et al. 2015

Phys. Part. Nuclei Lett.

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For metrology setups using a laser beam (the laserˇducial line, the precision laser inclinometer), the recording noise has been determined. This noise is limiting the measurement precision of the beam displacement Δx and, consequently, the precision Δψ of measurement of the beam inclination angle. For a 10 mm laser beam diameter, Δx = ±2.9 • 10 −9 m has been obtained. For a one-mode laser beam with a primary diameter of 10 mm and with subsequent focusing, a value of Δψ = ±1.7 • 10 −11 rad has been found.

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“…5, the change of sensibility (9) as a function radius of spot is shown. A theoretical analysis of the quadrant photodiode sensitivity, where the Gaussian distribution of the light spot irradiance is assumed is given in [5]. The sensitivity was calculated for a full range of the ratio between the light spot radius and the photodiode radius.…”

Section: Sensitivitymentioning

confidence: 99%