High-performance laser projection display illumination system based on a diffractive optical element

Liang, Chuanyang; Zhang, Wei; Rui, Dawei; Sui, Yongxin; Yang, Hang

doi:10.1364/ao.56.002810

Cited by 4 publications

(1 citation statement)

References 17 publications

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“…In recent years, lasers have been considered as potential illumination sources for the next generation of projectors 1 . However, the high spatial coherence of lasers results in coherent imaging artifacts caused by interference that occurs during image formation.…”

Section: Introductionmentioning

confidence: 99%

A ring-shaped random laser in momentum space

Bian

Shi

et al. 2020

Nanoscale

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A color-switchable random laser is designed through directly coupling random laser with a commercial optical fiber. By using a simple approach of selectively coating the random gain layer on the surface of fiber, the red and yellow random lasers are respectively achieved with low threshold and good emission direction due to the guiding role of optical fibers. Moreover, the unique coupling mechanism leads to the random lasing with ring-shape in momentum space, indicating an excellent illuminating source for high-quality imaging with an extremely low speckle noise. More importantly, random lasing with different colors can be flexible obtained by simply moving the pump position. The results may promote random lasers' practical applications in the fields of sensing, in vivo biologic imaging, high brightness full-field illuminating. Experimental MethodsThe fabrication process of the fiber source is illustrated in Fig. 1a. The typical gain materials used in this experiment are: 4-(Dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethyljulolidin-4-yl-vinyl) -4H-pyran(DCJTB, Tokyi Chemical Industry) and Pyrromethene567 (PM567, Sigma). The fabricated process of the fiber source is simply supplied as follows. First, polydimethylsiloxane (PDMS, n = 1.41) solution is mixed with cross-linking solution with the ratio of 1:10. Then, TiO 2 nanoparticles are dispersed in the dye-doped acetone solution (DCJTB at 1.5 mg mL -1 or PM567 at 1.25 mg mL -1 ) to obtain TiO 2 dispersion with a concentration of 0.9 mg mL -1 . The dye-doped TiO 2 dispersion and PDMS are mixed at a volume ratio of 1: 5 in an ultrasonic tank for 15 min and then vacuum them for 40 min to remove the air bubble. Finally, the mixture is dipped onto a clean fiber (TAIHAN Fiber Optics) to flow naturally. The length of the fiber is about 60 mm, the core diameter is 50 μm and the diameter of the cladding is 125 μm. The refractive indexes of the core and cladding layer are 1.54 and 1.52, respectively. The sample is placed in a drying oven at 80 °C for 3 hours to complete the cross-linking polymerization and drying. After cooling to room temperature, a fiber source is realized. Random lasers with different colors can be fabricated by coating different dye polymers at different locations on the surface of the fiber. And the polymer film with different thicknesses can be fabricated by controlling the dipping times.Acs Nano, 2017, 11. 36.

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Section: Introductionmentioning

confidence: 99%

A ring-shaped random laser in momentum space

Bian

Shi

et al. 2020

Nanoscale

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Design and realization of two-dimensional beam steering actuated by dielectric elastomer

Cheng

Cao

Chen

et al. 2022

Optics Communications

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Excellent luminous efficiency and high thermal stability of glass-in-LuAG ceramic for laser-diode-pumped green-emitting phosphor

et al. 2018

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A kind of glass-in-LuAG (GIP) ceramic with excellent luminous efficiency and high thermal stability was fabricated by solid-state sintering for laser diode (LD)-pumped green-emitting phosphor. The GIP ceramic employing particularly designed borosilicate glass as adhesive exhibits high thermal conductivity (2.8 W/m·K at 80°C) and remarkable improvement in thermal stability (T=711°C) and reliability (luminous flux has only a 0.5% drop after 100 h at 300°C). When the GIP ceramic is pumped by 455 nm blue LDs (14.5 W/mm), a luminous efficacy of 205 lm/W was achieved. More importantly, the GIP ceramic did not have luminescence saturation even under a higher power density (17.1 W/mm) excitation. The novel GIP ceramic, possessing good optical and thermal properties, is promising for LD-pumped green-emitting phosphor.

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High-performance laser projection display illumination system based on a diffractive optical element

Cited by 4 publications

References 17 publications

A ring-shaped random laser in momentum space

A ring-shaped random laser in momentum space

Design and realization of two-dimensional beam steering actuated by dielectric elastomer

Excellent luminous efficiency and high thermal stability of glass-in-LuAG ceramic for laser-diode-pumped green-emitting phosphor

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