Optically Pumped Semiconductor Lasers | Features | Jan ...- optically pumped organic semiconductor lasers ,The past few years have seen a resurgence of interest in optically pumped — rather than electrically pumped — semiconductor lasers. Optically pumped semiconductor lasers show significant promise as efficient, compact, reliable sources, offering power levels of up to several watts and good spatial mode quality at a range of wavelengths.Modelling of the laser dynamics of electrically pumped ...Dec 01, 2005· The properties of electrically pumped organic laser devices are investigated by the self consistent numerical solution of the spatially inhomogeneous laser rate equations coupled to a drift-diffusion model for the electrons, holes and singlet excitons. ... Modelling of the laser dynamics of electrically pumped organic semiconductor laser diodes ...

### Temperature independent performance of organic ...

Jun 04, 1998· Characteristics of lasing in optically pumped, vacuum deposited organic semiconductor thin films of tris-(8-hydroxyquinoline) aluminum doped with DCM laser dye are studied as a function of DCM concentration and ambient temperature. In contrast to inorganic laser diodes, the lasing wavelength, output power, differential quantum efficiency, and …

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### US6111902A - Organic semiconductor laser - Google Patents

An optically-pumped laser having a small-molecule thin organic film of DCM doped Alq 3 . Carrier transport properties of the small-molecule organic materials, combined with a low lasing threshold provide a new generation of diode lasers employing organic thin films. An electrically-pumped variant is also described.

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### Laser Diode-Pumped Organic Semiconductor Lasers Utilizing ...

Apr 23, 2007· Abstract: Two-dimensional photonic crystal lasers based on the small molecule organic semiconductor tris-(8-hydroxyquinoline) aluminum (Alq 3) doped with 4-Dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) are optically pumped with a conventional low-cost pulsed (In)GaN laser diode.We compare photonic crystal …

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### Indication of current-injection lasing from an organic ...

May 31, 2019· The properties of optically pumped organic semiconductor lasers (OSLs) have dramatically improved in the last two decades as a result of major advances in both the development of high-gain organic semiconductors and the design of high Q-factor resonators. 1–3) Owing to recent advances in low-threshold distributed feedback (DFB) OSLs, optical …

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### Organic Semiconducting Lasers - School of Mathematics and ...

Jan 06, 2021· Furthermore, use of organic semiconductors opens up the prospect of compact, tunable, low-cost, disposable lasers suitable for a wide range of applications. Almost all organic semiconductor lasers (OSL) reported have needed another laser (mainly bulky and expensive) to optically pump them to reach a threshold. This is a cumbersome and expensive ...

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### Existence of continuous-wave threshold for organic ...

Dec 05, 2011· We develop a model that predicts two threshold pump intensities in optically pumped organic semiconductor lasers (OSLs); one for pulsed lasing, I P S, and another for continuous-wave (CW) lasing, I C W.The theory predicts a decrease in I C W from 32 kW/cm 2, or well above the damage threshold, to 2.2 kW/cm 2, for a laser employing 4-(dicyanomethylene) …

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### Organic Lasers - an overview | ScienceDirect Topics

Organic Semiconductor Gain Materials. A great advantage of organic laser media is that a very wide range of materials can be readily synthesized, and through minor changes in the molecular structure one can relatively simply tune the emission properties of the material. ... The more recent discovery of optically pumped lasing of PPV further ...

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### Temporal response of optically pumped organic ...

Feb 11, 2009· We study the step response of optically pumped organic semiconductor lasers and find that lasing is sustained for $<150\text{ }\text{ns}$ following pump turn on due to annihilation quenching of guest singlet with host triplet excitons. We derive a general criterion for reaching threshold that critically depends on the pump rise time, the singlet-triplet quenching …

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### Optically pumped organic semiconductor laser with low ...

Recently, we have presented optically-pumped edge-emitting organic laser devices consisting of Alq3:DCM film (5% DCM) deposited onto a polished GaAs (100) substrate coated with an 1-um-thick layer ...

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### Optically pumped organic semiconductor laser with low ...

Aug 31, 2006· Optically pumped organic semiconductor laser with low temperature-cleaved mirrors Shibamoto, Masataka 2006-08-31 00:00:00 While preparing parallel mirrors for edge-emitting organic semiconductor lasers (OSLs) by cleaving, the edge of an organic layer is severely damaged typically by the force of cleaving the substrate. By using an organic layer ...

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### Circular Grating DFB Organic Semiconductor Lasers

Oct 28, 2001· Experimental work in the project will be directed at a proof-of-principle demonstration of optically pumped circular DFB organic semiconductor laser ( CDOSL) operation and performance optimisation. Design work will be undertaken to identify circular grating structures which provide low optical pumping thresholds as a means for the practical ...

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### Temporal response of optically pumped organic ...

We study the step response of optically pumped organic semiconductor lasers and find that lasing is sustained for <150 ns following pump turn on due to annihilation quenching of guest singlet with host triplet excitons. We derive a general criterion for reaching threshold that critically depends on the pump rise time, the singlet-triplet ...

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### Very compact tunable solid-state laser utilizing a thin ...

May 01, 2001· Optically pumped organic semiconductor lasers are fabricated by evaporation of a thin film of tris(8-hydroxyquinoline) aluminum (Alq(3)) molecularly doped with a laser dye on top of a polyester substrate with an embossed grating structure. We achieve low-threshold, longitudinally monomode distributed-feedback laser operation. ...

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### Organic laser breakthrough - Electrical Engineering and ...

So-called electrically pumped lasers are more efficient and useful than their optically pumped counterparts. But so far, organic semiconductors have been too fragile to survive exposure to the amount of electrical current necessary to get them to operate as lasers. “We’re looking at polaritons as a way to do electrical pumping of organic ...

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### CURRENT-INJECTION ORGANIC SEMICONDUCTOR LASER …

Oct 19, 2021· The properties of optically pumped organic semiconductor lasers (OSLs) have dramatically improved in the last two decades as a result of major advances in both the development of high-gain organic semiconductor materials and the design of high-quality-factor resonator structures 1-5. The advantages of organic semiconductors as gain media for ...

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### Pursuing electrically pumped lasing with organic ...

The bigger picture. The pursuit of electrically pumped organic lasers remains a grand challenge due to unbalanced optical gain and carrier mobility, as well as triplet losses associated with electrical injection into the organic semiconductors. Recent progresses with respect to molecular design, theoretical prediction, and device fabrication ...

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### Pursuing electrically pumped lasing with organic ...

Nov 16, 2021· The critical challenges that have prevented the achievement of electrically pumped organic lasers are summarized in this perspective. From the viewpoint of basic structure-property relationship in organic semiconductor materials and devices, we then highlight some potential solutions to address these issues, which are expected to attract more …

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### Laser Diode-Pumped Organic Semiconductor Lasers Utilizing ...

Apr 23, 2007· Abstract: Two-dimensional photonic crystal lasers based on the small molecule organic semiconductor tris-(8-hydroxyquinoline) aluminum (Alq 3) doped with 4-Dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) are optically pumped with a conventional low-cost pulsed (In)GaN laser diode.We compare photonic crystal …

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### Optically pumped organic semiconductor laser with low ...

Dec 05, 2006· While preparing parallel mirrors for edge-emitting organic semiconductor lasers (OSLs) by cleaving, the edge of an organic layer is severely damaged typically by the force of cleaving the substrate. By using an organic layer hardened at a low temperature, we were able to cleave an organic layer along the facet of the substrate and reproducibly obtain smooth and …

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### Toward electrically driven semiconductor nanowire lasers

Over the past 15 years, this area of research has been developing rapidly, with extensive reports of optically pumped lasing in various inorganic and organic semiconductor NWs. Motivated by these developments, substantial efforts are being made to make NW lasers electrically pumped, which is necessary for their practical implementation.

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### Indication of current-injection lasing from an organic ...

May 31, 2019· The properties of optically pumped organic semiconductor lasers (OSLs) have dramatically improved in the last two decades as a result of major advances in both the development of high-gain organic semiconductors and the design of high Q-factor resonators. 1–3) Owing to recent advances in low-threshold distributed feedback (DFB) OSLs, optical …

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### Modelling of the laser dynamics of electrically pumped ...

Dec 01, 2005· The properties of electrically pumped organic laser devices are investigated by the self consistent numerical solution of the spatially inhomogeneous laser rate equations coupled to a drift-diffusion model for the electrons, holes and singlet excitons. ... Modelling of the laser dynamics of electrically pumped organic semiconductor laser diodes ...

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### (PDF) Optically Pumped GaN-based Vertical Cavity Surface ...

The solid dot shows is the laser wavelength, Vc is the optical volume of laser the experiment data and the solid line is the linear ﬁt of the experiment emission, and n is the refractive index. Since the photo- data. luminescence spectrum of our hybrid DBR VCSEL showed a narrow emission peak with full width at half maximum of 0.61 nm, cavity ...

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### The pursuit of electrically-driven organic semiconductor ...

Organic semiconductors have many favourable and plastic-like optical properties that are promising for the development of low energy consuming laser devices. Although optically-pumped organic semiconductor lasers have been demonstrated since the early days of lasers, electrically-driven organic lasers have not been realized and have become one ...

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