Abstract Organic solid‐state lasers are reviewed, with a special emphasis on works published during the last decade. Referring originally to dyes in polymeric matrices, organic also include rich family of semiconductors, paced by rapid development light‐emitting diodes. broadly tunable coherent sources, potentially compact, convenient and manufactured at low cost. In this review, we describe basic photophysics materials used as gain media specific look distinctive features semiconductors. We...

The so-called PT symmetric devices, which feature ε((-x)) = ε((x))* associated with parity-time symmetry, incorporate both gain and loss can present a singular eigenvalue behaviour around critical transition point. scheme, typically based on co-directional coupled waveguides, is here transposed to the case of variable one arm fixed losses other arm. In this configuration, scheme exploits full potential plasmonics by making beneficial use their attain regime that makes switching possible much...

We have developed a diode-pumped Yb3+:Sr3YBO33 (Yb:BOYS) laser generating 69-fs pulses, at central wavelength of 1062 nm. This is mode locked by use semiconductor saturable-absorber mirror and emits 80 mW average power 113 MHz. is, to our knowledge, the first mode-locked Yb:BOYS shortest duration obtained from an ytterbium with crystalline host. The can be tuned 1051 1070 nm, for sub-100-fs pulses. also achieved as high 300 pulse 86 fs 1068

A theoretical and experimental study of thermal lensing in Yb-doped crystals is presented. In this first part, we focus on considerations describe an original technique suitable for measurements end-pumped materials. We derive expression the temperature distribution with account absorption saturation pump beam divergence inside crystal, address a more general discussion particularities quasi-three-level lasers, as far effects fracture issues are concerned. The lens was then measured using...

High-power light-emitting diodes (LEDs) today are twice as powerful four years ago while meantime their price has been divided by 4 making them promising sources for laser pumping. However, irradiance still falls short one order of magnitude what is needed to efficiently pump solid-state lasers. We demonstrate that an LED-pumped Ce:YAG luminescent concentrator (LC) can increase the blue LEDs a factor 10, with optical efficiency 25%, much more suitable In our demonstration, we used 100 Hz...

The first demonstration of laser action in a Yb3+:Sr3Y(BO3)3 crystal is reported. This new material exhibits particularly broad absorption and emission bandwidths (6 60 nm, respectively) hence particular interest for diode-pumped femtosecond tunable sources. Efficient operation from diode pumping (1.4 W cw power obtained with 3.6 pump as much 3.4 peak high-power quasi-cw pumping) together smooth tunability (over 50 nm FWHM) For the comparison, efficiency thermal limitations Yb:glass...

We report what is believed to be the first diode-pumped Yb(3+): SrY(4)(SiO(4)) (3)O laser. investigate both cw and mode-locked regimes. In regime an average output power of 1.05 W demonstrated for 3.6 incident pump power. femtosecond a pulse duration 94 fs 110 mW obtained at central wavelength 1068 nm. This is, our knowledge, oscillator made with Yb-doped apatitelike crystal. These properties are related unique spectroscopic Yb(3+) ions in this atypical apatite-family

A theoretical and experimental study of thermal lensing in Yb-doped crystals is presented. This papers follows the presentation considerations wavefront measurements, which have been subject Part I. In this paper, we evolution versus absorbed pump power, derive two parameters valuable for laser design power scaling. The quantum efficiency thermo-optic coefficient, YAG, GGG, GdCOB, YCOB, KGW YSO. clear difference between under lasing nonlasing conditions proof that nonradiative effects occur...

Abstract Exciton‐polaritons, in which the electronic state of an excited organic molecule and a photonic are strongly coupled, can form Bose–Einstein condensate (BEC) at room temperature. However, so far, reported thresholds polariton BECs under optical excitation as high P th = 11–500 μJ cm –2 . One route toward lowering condensation threshold is to increase Rabi energy by aligning molecular transition dipole moments. In this report, it demonstrated that control orientation perylene‐based...

Stimulated emission in small-molecule organic films at a high dye concentration is generally hindered by fluorescence quenching, especially the red region of spectrum. Here we demonstrate achievement net gains (up to 50 cm−1) around 640 nm thermally evaporated nondoped 4-di(4′-tert-butylbiphenyl-4-yl)amino-4′-dicyanovinylbenzene, which makes this material suitable for green-light pumped single mode lasers with low threshold and superior stability. Lasing effect demonstrated distributed Bragg...

An innovative concept of thin-film organic solid-state laser is proposed, with diffraction-limited output and a broad tuning range covering the visible spectrum under UV optical pumping. The beam tunable over 230 nm, from 440 to 670 3 nm full width at half maximum typical spectral width. structure consists compact fixed bulk cavity, polymeric intracavity etalon for wavelength tuning, as well five different disposable glass slides coated dye-doped polymer film, forming very simple low-cost...

We report on a solid-state laser structure functioning as the organic counterpart of vertical external-cavity surface-emitting (VECSEL) design. The gain medium is poly(methyl methacrylate) film doped with Rhodamine 640, spin casted onto high-reflectivity mirror plano–concave resonator. Upon pumping by 7ns pulses at 532nm, diffraction-limited beam (M2=1) was obtained, conversion efficiency 43%; higher peak powers (2kW) could be attained when resorting to shorter (0.5ns) pump pulses. spectrum...

High-power, diffraction-limited organic solid-state laser operation has been achieved in a vertical external cavity surface-emitting (VECSOL), pumped by low-cost compact blue diode. The diode-pumped VECSOLs were demonstrated with various dyes polymer matrix, leading to emissions from 540 nm 660 nm. Optimization of both the pump pulse duration and output coupling leads slope efficiency 11% for DCM based VECSOLs. We report energy up 280 nJ 100 ns long pulses, peak power 3.5 W circularly...

Optically pumped lasers based on solution-processed thin-film gain media have recently emerged as low-cost, broadly tunable, and versatile active photonics components that can fit any substrate are useful for, e.g., chemo- or biosensing visible spectroscopy. Although single-mode operation has been demonstrated in various resonator architectures with a large variety of media-including dye-doped polymers, organic semiconductors, and, more recently, hybrid perovskites-the reported linewidths...

A solid-state organic thin-film laser with intracavity frequency doubling is reported. Tunable ultraviolet emission from 309 to 322 nm achieved a vertical external cavity surface-emitting laser, 2% efficiency (1 μJ at 315 nm). The comprises poly(methyl methacrylate) layer doped Rhodamine 640, spun-cast onto plane mirror, remote concave nonlinear crystal, and dichroic separator. output spectrally narrow (<0.5 full width half maximum) tunable through phase-matching selection of the...

Hybrid pumping appears as a promising compromise in order to reach the much coveted goal of an electrically pumped organic laser. In such configuration material is optically by inorganic device on chip. This engineering solution requires therefore optimization gain medium under optical pumping. Here, we report detailed study features dye-doped polymer thin films. particular introduce efficiency $K$, facilitate comparison between different materials and experimental conditions. The was...

The polarization states of lasers are crucial issues both for practical applications and fundamental research. In general, they depend in a combined manner on the properties gain material structure electromagnetic modes. this paper, we address issue case solid-state organic lasers, technology which enables to vary independently mode properties. Different kinds resonators investigated: in-plane micro-resonators with Fabry-Perot, square, pentagon, stadium, disk, kite shapes, external vertical...

High performance organic semiconductor lasers (OSLs), especially those under current injection, have been sought for decades due to their potentially great applications in fields such as spectroscopy, displays, medical devices, and optical interconnection. The design fabrication of high-quality resonators is a prerequisite high OSLs. In the case planar microcavities, process top distributed Bragg reflectors (DBRs) usually requires electron beam evaporation or manual lamination on thin-film...

With the recent development of organic solid-state lasers (OSSLs) architectures enabling power scaling and progresses towards continuous-wave operation, question thermal effects now arises in OSSLs.In this paper, a Rhodamine 640-PMMA based vertical external cavity surface emitting laser is investigated.A microscope used to record temperature maps at thin film during action; those are compared with time-resolved finite element simulations.The measured simulated peak rises good accordance...