Wavelength extension beyond 3 µm in a Ho/Pr co-doped AlF-based fiber laser.

In this Letter, we report continuous-wave (CW) lasers with wavelengths beyond 3 µm in homemade Ho/Pr co-doped AlF-based glass fibers. The laser cavity was established through the integration of a dichroic mirror (DM, HR@3-3.1 µm) positioned at the pump end and a partial reflectivity (PR) fiber Bragg grating (FBG) situated at the laser emission end.

Laser operation at 1.2 µm in Ho-doped ZBYA glass fibers.

Powerful 1.2-µm laser operation was produced in Ho-doped single-cladding, in-house fabricated ZrF-BaF-YF-AlF (ZBYA) glass fibers. The fibers were fabricated based on ZBYA glass with a composition of ZrF-BaF-YF-AlF.

Efficient 2075-nm laser emission from Ho-doped fluorotellurite glass in a compact all-fiber structure.

In this Letter, we report an Ho-doped fluorotellurite glass all-fiber laser at 2075 nm. The gain fiber is pumped in-band with a 1976-nm fiber laser and connected by fusion splicing. A high-quality fusion splicing point with a loss of < 0.

Two-watt mid-infrared laser emission in robust fluorozirconate fibers.

To the best of our knowledge, we report here the first demonstration of 2.9 µm laser emission from in-house fabricated Ho/Pr co-doped ZBYA glass fiber. The fiber was fabricated based on the ZBYA glass with compositions of ZrF-BaF-YF-AlF-PbF-HoF-PrF.

Praseodymium mid-infrared emission in AlF-based glass sensitized by ytterbium.

Broadband emission was obtained over 2.6 to 4.1 μm (Pr: G→F, F) in AlF-based glass samples doped with different concentrations of praseodymium and 1 mol% ytterbium using a 976 nm laser pump.

2 µm lasing from Tm-doped PbO-PbF-BiO-GaO glass microspheres.

Whispering gallery mode (WGM) lasers at ∼2µ are demonstrated in PbO--- (PBG) heavy metal oxyfluoride glass microspheres. A 793 nm diode laser is used to pump the PBG microsphere and achieve single-mode and multimode WGM lasing. The fluorescence spectra of -doped PBG glasses are measured under 793 nm diode laser pumping.

Room-temperature watt-level and tunable ∼3 µm lasers in Ho/Pr co-doped AlF-based glass fiber.

A room-temperature watt-level continuous-wave-output power mid-infrared fiber laser operating at $\lambda\sim 3\; \unicode{x00B5}{\rm m}$ is demonstrated using a ${{\rm Ho}^{3 +}}/{{\rm Pr}^{3 +}}$ co-doped ${{\rm AlF} _3}$ based glass fiber as a gain fiber. This fixed-wavelength laser had maximum output power of 1.13 W with a slope efficiency of 10.

Enhanced 3.9 µm emission from diode pumped Ho/Eu codoped fluoroindate glasses.

The use of codoping for enhancing the :→ emission in fluoroindate glasses shows that could depopulate the lower laser state : while having little effect on the upper state :, resulting in greater population inversion. The / codoped glass has high spontaneous transition probability (6.31) together with large emission cross section (7.

Circulating sFasL Levels Predict the Severity and Outcome of Burn Injury: A Prospective Observational Study.

Background: Severe burn injury activates shock, inflammation, and blood cell system, but inappropriate reactions may lead to adverse outcomes. Soluble Fas ligand (sFasL) participates in apoptosis and inflammatory response. The circulating sFasL levels we investigated in association with the burn severity, shock, inflammation, blood cells, and mortality in patients with severe burns.

Broadband 2.7 µm mid-infrared emissions in Er-doped PbO-PbF-BiO-GaO glasses.

Broadband emission at 2.7 µm is observed in an -doped --- glass. The measured emission band full-width-at-half-maximum (FWHM) is ∼184.

Intense mid-infrared emission at 3.9 µm in Ho-doped ZBYA glasses for potential use as a fiber laser.

Intense mid-infrared emission at 3.9 µm in -doped ZBYA glasses with direct upper laser level (:) pumping at a wavelength of 888 nm is reported for the first time, to the best of our knowledge. Spectroscopic parameters were determined using the Judd-Ofelt theory and the measured absorption spectrum.

Tm-doped fluorotellurite glass microsphere resonator laser at 2.3 µm.

In this Letter, we report lasing at 2.3 µm in Tm-single-doped and Tm/Ho-codoped fluorotellurite glass microsphere resonators. By employing a 793 nm diode laser as a pump and exploiting whispering gallery mode microresonators (WGMRs), dual-wavelength lasing at 1.

2.9 µm lasing from a Ho/Pr co-doped AlF-based glass fiber pumped by a 1150 nm laser: publisher's note.

This publisher's note contains corrections to Opt. Lett. 45, 1216 (2020).

2.9 µm lasing from a Ho/Pr co-doped AlF-based glass fiber pumped by a 1150 nm laser.

/ co-doped -based glass fibers were fabricated by using a rod-in-tube method based on the matrix glass composition of --------. Under the pump of a 1150 mW Raman fiber laser, a 2.9 µm laser was observed in a 19 cm long / co-doped -based glass fiber with an output power of 173 mW and a slope efficiency of 10.

In-fiber temperature sensor based on green up-conversion luminescence in an Er-Ybco-doped tellurite glass microsphere.

A novel, to the best of our knowledge, in-fiber temperature sensor based on green up-conversion (UC) luminescence in an Er-Yb co-doped tellurite glass microsphere is described. The tellurite glass microsphere is located firmly inside a suspended tri-core hollow-fiber (STCHF) structure. The pump light launched via a single-mode fiber (SMF) is passed through a section of multimode fiber, which is fusion spliced between the SMF and the STCHF into the cores suspended inside the hollow fiber and coupled into the microsphere.

Tm-Ho codoped tellurite glass microsphere laser in the 1.47 μm wavelength region.

In this Letter, a Tm-Ho codoped tellurite glass microsphere laser in the 1.47 μm wavelength region is described. Using a traditional tapered microfiber-microsphere coupling method, multimode and single-mode lasing around the wavelength of 1.

Investigation of a novel SMS fiber based planar multimode waveguide and its sensing performance.

A novel, MMI-based all-fiber structure, which consists of two single-mode fibers and a multimode fiber polished on both sides, is described. The light propagation characteristics of this fiber structure, as well as its superior sensing performance, are analyzed theoretically by using the beam propagation method (BPM). This fiber structure demonstrates a significant spectral response to changes of the surrounding refractive index (RI), and the measured results exhibit good agreement with the predicted data.

Broadband multicolor upconversion from Yb-Mn codoped fluorosilicate glasses and transparent glass ceramics.

In contrast to well-known upconversion (UC) emission from Yb-Mn-codoped crystal, a room-temperature intense broadband UC phenomenon was first observed in both Yb-Mn-codoped fluorosilicate glasses and transparent glass ceramics under 980 nm pumping. The obtained photoluminescence ranged from yellow to white to blue. We attributed this effect to the cooperative UC of Yb and to the formation of Yb-Mn pairs.

Effect of Tm concentration on the emission wavelength shift in Tm-doped silica microsphere lasers.

In this work, a Tm-doped solgel silica microsphere lasing at 2.0 μm is reported. Microspheres with different Tm concentrations are fabricated by overlaying different Tm concentration solgel solutions on the surface of a pure silica microsphere resonator and then annealing the sample with a CO laser.

In-fiber whispering-gallery mode microsphere resonator-based integrated device.

A novel in-fiber whispering-gallery mode (WGM) microsphere resonator-based integrated device is reported. It is fabricated by placing a silica microsphere into an embedded dual-core hollow fiber (EDCHF). Using a fiber tapering method, a silica microsphere can be placed and fixed in the transition section of the hollow core of the EDCHF.

Comparative effectiveness of different wound dressings for patients with partial-thickness burns: study protocol of a systematic review and a Bayesian framework network meta-analysis.

Introduction: Selecting a suitable wound dressing for patients with partial-thickness burns (PTBs) is important in wound care. However, the comparative effectiveness of different dressings has not been studied. We report the protocol of a network meta-analysis designed to combine direct and indirect evidence of wound dressings in the management of PTB.

Optical characterization of Tm(3+) doped Bi2O3-GeO2-Ga2O3 glasses in absence and presence of BaF2.

In this paper, Two new Bi2O3-GeO2-Ga2O3 glasses (one presence of BaF2) doped with 1mol% Tm2O3 were prepared by melt-quenching technique. Differential thermal analysis (DTA), the absorption, Raman, IR spectra and fluorescence spectra were measured. The Judd-Ofelt intensity parameters, emission cross section, absorption cross section, and gain coefficient of Tm(3+) ions were comparatively investigated.

Tapered fluorotellurite microstructured fibers for broadband supercontinuum generation.

Fluorotellurite microstructured fibers (MFs) based on TeO2-BaF2-Y2O3 glasses are fabricated by using a rod-in-tube method. Tapered fluorotellurite MFs with varied transition region lengths are prepared by employing an elongation machine. By using a tapered fluorotellurite MF with a transition region length of ∼3.

Holmium-doped fluorotellurite microstructured fibers for 2.1 μm lasing.

Holmium (Ho3+)-doped fluorotellurite microstructured fibers based on TeO2-BaF2-Y2O3 glasses are fabricated by using a rod-in-tube method. By using a 1.992 μm fiber laser as the pump source, lasing at 2.