Multiple-wavelength synthetic green laser source for speckle reduction

Kuksenkov, D.V.; Roussev, Rostislav V.; Li, Shenping; Wood, William A.; Lynn, Christopher M.

doi:10.1117/12.887545

Cited by 21 publications

(34 citation statements)

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“…[1], [2] and references therein). We have shown experimentally and theoretically that lasers with a strongly asymmetric waveguide structure with the refractive index contrast between the waveguide and the p-cladding much greater than between the waveguide and the n-cladding, are attractive for high-energy optical pulse generation by gain switching using lasers with both bulk and Quantum Well (QW) active layers [3]- [5]; the approach has subsequently been used by other authors [6]. Here, we summarise the developments so far and present the recent experimental and theoretical results.…”

Section: Introductionmentioning

confidence: 96%

Strongly asymmetric waveguide semiconductor lasers for picosecond pulse generation by gain- and Q-switching

Ryvkin

Avrutin

Lanz

et al. 2014

2014 16th International Conference on Transparent Optical Networks (ICTON)

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We present theoretical investigation of single-and double-section high power semiconductor lasers with strongly asymmetric waveguides with a very large active layer thickness to optical confinement factor ratio, for generation of picosecond pulses. It is shown that such laser constructions compare favourably with alternative constructions as regards generating high-energy, trail-free pulses in a single transverse mode, with high electric to optical power conversion efficiency. Laser performance and operating characteristics under gain and combined gain/Q-switching operating regimes are analysed and compared. For the case of the combined regime in a double-section laser, experimental observation of high-energy trail-free pulses is reported.

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Section: Introductionmentioning

confidence: 96%

Strongly asymmetric waveguide semiconductor lasers for picosecond pulse generation by gain- and Q-switching

Ryvkin

Avrutin

Lanz

et al. 2014

2014 16th International Conference on Transparent Optical Networks (ICTON)

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“…Considering the development levels of laser sources, products are varied and mature enough for the red and blue LDs. While for the green laser, few products could meet the requirements and their performances have little difference [22]- [24]. We firstly optimize the red and blue laser sources and consider more about luminance efficiency and color gamut.…”

Section: Red and Bluementioning

confidence: 99%

A Novel Laser-Based Display and Imaging Combined System

Wang

Cui

et al. 2018

IEEE Photonics J.

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Laser-based displays can offer a wide color gamut to the viewers due to the narrow bandwidth of laser source, which is quite different from traditional display systems. Therefore, the color rendition standards for traditional displays are no longer suitable for laser-based displays. An optimized and practical color reproduction system is proposed and demonstrated for laser-based displays in this paper. Not only the three primary wavelengths are well chosen by considering the luminance efficiency, color gamut, and color matching function, but also the response function of a camera system is optimized for a simplified color reproduction procedure. A remarkably high color rendition quality is presented in our experiment compared with traditional displays.

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“…The speckle reduction techniques for laser projection systems were well organized in Goodman . The most commonly used and effective methods to reduce speckle include wavelength diversity, polarization diversity, angular diversity, and temporal averaging of speckle (temporal diversity) using moving or vibrating diffuser . In the laser projection systems, combinations of some or all of these methods are used to suppress speckle to the acceptable level …”

Section: Introductionmentioning

confidence: 99%

Dependency of speckle reduction by wavelength diversity on angular diversity in laser projection system

Yamada

Moriyasu²,

Sato

et al. 2018

J Soc Info Display

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Speckle is one of the most serious problems in laser projection system. Most speckle reduction methods in a laser projector can be categorized into wavelength diversity, angular diversity, and polarization diversity. In order to reduce speckle to the acceptable level, the combination of some or all of these methods are used. When the speckle reduction by wavelength diversity and angular diversity are used at the same time, the total speckle reduction can be different from the product of each speckle reduction effect when each of them is used separately. Here, the theoretical model of speckle reduction by wavelength diversity and angular diversity when they are used at the same time is derived. The calculation results by the theoretical model are compared with the experimental results. It is shown that theoretical calculation agrees well with the experimental results.

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Multiple-wavelength synthetic green laser source for speckle reduction

Cited by 21 publications

References 0 publications

Strongly asymmetric waveguide semiconductor lasers for picosecond pulse generation by gain- and Q-switching

Strongly asymmetric waveguide semiconductor lasers for picosecond pulse generation by gain- and Q-switching

A Novel Laser-Based Display and Imaging Combined System

Dependency of speckle reduction by wavelength diversity on angular diversity in laser projection system

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