External Electric Field Tailored Spatial Coherence of Random Lasing

Bian, Yaoxing; Yuan, Hongyu; Zhao, Jing‐Tai; Liu, Dahe; Gong, Wei; Wang, Zhaona

doi:10.3390/cryst12081160

Cited by 8 publications

(4 citation statements)

References 28 publications

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“…In addition, an RL with a controlled threshold, coherence, direction and polarization can be achieved with liquid crystals. A certain order from disorder is realized by the easy alignment of liquid crystal, either by external electric or temperature control [ 16 , 159 , 160 , 161 ]. Another material, the Janus particle—which acts as a micro-heater once illuminated by an external laser—can change the assembly of scattering particles around it.…”

Section: Discussionmentioning

confidence: 99%

Properties and Applications of Random Lasers as Emerging Light Sources and Optical Sensors: A Review

Späth

Klämpfl

et al. 2022

Sensors

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In a random laser (RL), optical feedback arises from multiple scattering instead of conventional mirrors. RLs generate a laser-like emission, and meanwhile take advantage of a simpler and more flexible laser configuration. The applicability of RLs as light sources and optical sensors has been proved. These applications have been extended to the biological field, with tissues as natural scattering materials. Herein, the current state of the RL properties and applications was reviewed.

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Section: Discussionmentioning

confidence: 99%

Properties and Applications of Random Lasers as Emerging Light Sources and Optical Sensors: A Review

Späth

Klämpfl

et al. 2022

Sensors

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“…It is becoming a promising illumination source in speckle-free lasing display and imaging. [10,[16][17][18][19] To promote the practical applications of random lasing, the researchers have intended to tailor random lasing field as a whole in emission wavelength, [20] linewidth, [21] polarization, [10,22] coherence, [23] and emission directions. [10,24] For example, by using the excellent guiding light property of optical fiber (OF), OF-based random lasers have been designed as fiber random laser [25,26] and the OF-integrated random lasers on the end [27] or side of the fiber [28,29] to obtain the good transmission directivity.…”

Section: Introductionmentioning

confidence: 99%

Angular Spectra Tunable Random Lasing for High Contrast Imaging

Shen

Yuan

Bian

et al. 2023

Advanced Physics Research

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Random lasers with low spatial coherence have important potential applications in speckle‐free imaging and displaying. Here, an angular spectra (AS) tunable random laser is proposed through directly coupling a microcavity with a commercial optical fiber. The local in‐plane AS distributions of the random lasing can be separately tuned by selectively using coupling filtering, free transmission, and intensity modulation. The obtained random lasing has the characteristics of non‐polarization and ring AS with distribution tunability. The unique properties endow the lasing as a promising illumination source for biological imaging. An excellent image with speckle‐free and high contrast is thus achieved with a maximal contrast improvement factor of 638% relative to that under the common white lighting. The results indicate that the designed AS‐tunable random laser has great application values in the fields of biological imaging, display, integration optics, and optical physics.

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“…For now, RLs have been realized with diverse gain media and scatterers in a variety of dimensionalities. The coherence can be adjusted by pumping power, cavity design, scattering strength [116][117][118] , and excited lasing modes 89,119 . For incoherent or low-coherent random lasing, it can be induced using scattering reflectors, photonic comb, powder, and laser paint 109 .…”

mentioning

confidence: 99%

Low-coherence semiconductor light sources: devices and applications

Lu,

Alkhazragi,

Wang

et al. 2024

npj Nanophoton.

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Since the invention of the laser, there have been countless applications that were made possible or improved through exploiting its multitude of unique advantages. Most of these advantages are mainly due to the high degree of coherence of the laser light, which makes it directional and spectrally pure. Nevertheless, many fields require a moderate degree of temporal or spatial coherence, making conventional lasers unsuitable for these applications. This has brought about a great interest in partially coherent light sources, especially those based on semiconductor devices, given their efficiency, compactness, and high-speed operation. Here, we review the development of low-coherence semiconductor light sources, including superluminescent diodes, highly multimode lasers, and random lasers, and the wide range of applications in which they have been deployed. We highlight how each of these applications benefsits from a lower degree of coherence in space and/or time. We then discuss future potential applications that can be enabled using new types of low-coherence light.

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External Electric Field Tailored Spatial Coherence of Random Lasing

Cited by 8 publications

References 28 publications

Properties and Applications of Random Lasers as Emerging Light Sources and Optical Sensors: A Review

Properties and Applications of Random Lasers as Emerging Light Sources and Optical Sensors: A Review

Angular Spectra Tunable Random Lasing for High Contrast Imaging

Low-coherence semiconductor light sources: devices and applications

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