Theoretical modeling of the divergence of a flat-topped beam from a two-stage beam shaper into a conical intensity profile after propagation in free space

Haghighatzadeh, Azadeh; Saadat, S.

doi:10.1016/j.optcom.2013.08.091

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…Traditionally, beam homogenizers are used to generate flat-top from gaussian beams through a variety of methods; microlens arrays [24], aspheric lens systems, spatial light modulators [25]- [27], prism-duct waveguide [28], cavity resonator [29], interferometers and diffractive gratings. However, these systems are bulky and not suitable for integration to a compact photonics integrated system.…”

Section: Theory Of Optical Phase Arrays (Opa)mentioning

confidence: 99%

Conceptual design and analysis of a compact liquid crystal on silicon non-mechanical optical beam steering antenna for lean platforms

Ishola¹,

Kolev²,

Kunimori³

et al. 2023

Free-Space Laser Communications XXXV

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We present concept design of an innovative, compact, non-mechanical optical beam steering antenna with an experimental liquid crystal beam shaper optimized for lean platforms. Laser communication terminals in air and space-borne platforms must fulfil the low-SWaP (size, weight, and power) design philosophy which is often a challenging task when utilizing mechanical steerers like prisms, MEMS fast steering mirrors, lenslet arrays, gimbal movers etc. We introduce the approach of a compact photonics integrated circuit consisting of power division network, optical phase array antennas and liquid crystal on silicon structure to form a laser transmitting module for a CubeSat. An Erbium Doped Fiber Amplifier provide adequate optical power output that can facilitate a baseline free-space communication link margin at 1550nm. The design parameters were tuned to achieve to minimal divergence and adequate beam steering angle, higher EIRP, high beam switching speed and tolerance of space environmental conditions. Applications are numerous and not limited to optical communication terminals on drones, aircrafts, and satellites; automotive LiDAR systems, medical and scientific instrumentation devices are also promising areas of rapid adoption and integration.

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Section: Theory Of Optical Phase Arrays (Opa)mentioning

confidence: 99%

Conceptual design and analysis of a compact liquid crystal on silicon non-mechanical optical beam steering antenna for lean platforms

Ishola¹,

Kolev²,

Kunimori³

et al. 2023

Free-Space Laser Communications XXXV

View full text Add to dashboard Cite

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Optimum Design and Characterization of F-Theta Lens by a 3D Printer(I)

Shin¹,

Yoon²,

Choi

2015

Journal of the Korean Society of Manufacturing Process Engineer

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A focal length-correcting lens called the F-theta lens is required to compensate for the different focus on spot size due to the deflected incident laser beam. The F-theta lens was designed by the ray tracing method and fabricated by a 3D printer with polymer-based material. The designed F-theta lens is able to compensate for the focus on spot size by an incidence angle of 0 to 2 degrees. Based on the analysis of the simulation, there was almost no aberration in the 0° incidence angle, and the maximum of 50µm of aberration was observed at the incidence angle of 2°. Diffraction-encircled energy was analyzed to characterize the designed optics, and an image simulation was performed to confirm the actual image resolution.

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Optimum Design and Characterization of F-theta lens by a 3D Printer(II)

Yoon¹,

Shin²,

Choi³

2015

Journal of the Korean Society of Manufacturing Process Engineer

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The fabrication of a focal length-correcting lens called the F-theta lens was performed by a 3D printer. The fabricated lenses were characterized by transmittance and reflectance measurements. The optical properties of the lens, such as scattering or transmittance efficiency, were analyzed with respect to the wavelength (red, green, and blue) and the surface roughness of the lens. There was almost no shape aberration on the focus location of 0 degrees, but elliptical focus shapes were found at 1 and 2 degrees of the laser incidence angle. The developed process is expected to be used for the quick fabrication of lenses with low costs and quick turn-out. By improving the surface roughness during postprocessing, the optical properties are expected to be comparable to commercial lens quality.

show abstract

Theoretical modeling of the divergence of a flat-topped beam from a two-stage beam shaper into a conical intensity profile after propagation in free space

Cited by 3 publications

References 26 publications

Conceptual design and analysis of a compact liquid crystal on silicon non-mechanical optical beam steering antenna for lean platforms

Conceptual design and analysis of a compact liquid crystal on silicon non-mechanical optical beam steering antenna for lean platforms

Optimum Design and Characterization of F-Theta Lens by a 3D Printer(I)

Optimum Design and Characterization of F-theta lens by a 3D Printer(II)

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