A5037609936- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Advanced Fiber Optic Sensors
- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Spectroscopy and Laser Applications
- Laser Design and Applications
- Laser-Matter Interactions and Applications
- Photonic and Optical Devices
- Laser Material Processing Techniques
- Chalcogenide Semiconductor Thin Films
- Advanced Optical Sensing Technologies
- Phase-change materials and chalcogenides
- Orbital Angular Momentum in Optics
- Microfluidic and Bio-sensing Technologies
- Glass properties and applications
- Ocular and Laser Science Research
- Advanced Surface Polishing Techniques
- Spectroscopy Techniques in Biomedical and Chemical Research
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
Fibertek (United States)
2024
University of Central Florida
2012-2023
Laser Institute of America
2017
Photonics (United States)
2015
Bellingham Technical College
2015
Thulium-doped fiber lasers (TDFLs) have had the second highest growth in average output power next to ytterbium-doped lasers. This has been enabled by access high power, brightness ~790-nm pump diodes conjunction with cross-relaxation process that improves laser efficiency. While numerous TDFLs recently demonstrated, a 1-kW result from 2010 remains system reported date. paper reviews these systems and concepts behind TDFLs. The spectroscopic properties of Tm <sup...
We report on the utilization of a novel Tm:fiber laser source for mid-IR ZnGeP2 (ZGP) optical parametric oscillator (OPO) pumping. The pump is built in master power-amplifier configuration delivering up to 3.36 W polarized, diffraction limited output power with 7 ns pulse duration and 4 kHz repetition rate. This corresponds peak ∼121 kW energy ∼0.84 mJ. With this source, we generated 27.9 total doubly resonant (DRO) configuration. is, best our knowledge, highest ever demonstrated from...
Mechanically robust and low loss single-mode arsenic sulfide fibers are used to deliver high power mid-infrared sources. Anti-reflection coatings were deposited on the fiber facets, enabling 90% transmission through 20 cm length fibers. 10.3 W was transmitted an anti-reflection coated at 2053 nm, uncoated sustained 12 MW/cm2 intensities facet without failure. A Cr:ZnSe laser >1 2520 a Fe:ZnSe 0.5 4102 nm. These results indicate that by improving using beam quality source, chalcogenide can...
To date, high-power scaling of Tm:fiber lasers has been accomplished by maximizing the power from a single fiber aperture. In this work, we investigate spectral beam combination three linearly polarized MOPA using dielectric mirrors with steep transition highly reflective to transmissive that enable minimum wavelength separation 6 nm between individual laser channels within range 2030 2050 nm. Maximum output is 253 W M(2)<2, ultimately limited thermal lensing in combining elements.
Double-crucible cane fabrication of highly purified chalcogenide-glass was combined with multimaterial thermal fiber drawing to produce robust low-loss 0.2 NA chalcogenide fibers. Optical transmission losses were shown be less than 1.1 dB/m at wavelengths 1.5, 2.0 and 4.6 μm. Fiber > 97% the 1.5 μm design wavelength demonstrated using single-layer anti-reflection coatings that durable under temperature, humidity abrasion tests. Tensile-strength tests proved mechanical strength improved by a...
Stimulated Brillouin scattering (SBS) is the first nonlinear effect that limits power scaling of narrow linewidth fiber lasers. Nonlinearities typically have a reduced impact when operating at longer wavelengths. However, SBS gain considered wavelength independent. To investigate this further, pulsed 2053 nm source with MHz-linewidth amplified to >100 W peak powers in single-mode, thulium-doped fiber. The thresholds were measured while varying pulse duration. Analyzing threshold measurements...
We detail the design and performance of a high efficiency in-band pumped thulium fiber amplifier operating at 100 W level. Using novel pumping architecture based on three incoherently combined oscillators 1904 nm seed laser tunable from 1970-1990 nm, efficient amplification is demonstrated in dopant concentration 25/65/250 µm fiber. Here we use 65 pedestal surrounding core as pump cladding to increase overlap improve overall absorption. Up 89% slope obtained with ∼100 output power 1990 nm....
Within the past 10 years, thulium (Tm)-doped fiber lasers have emerged as a flexible platform offering high average power well peak power. Many of benefits and limitations Tm:fiber are similar to those for ytterbium (Yb)-doped lasers, however ~2 µm emission wavelength posses unique challenges in terms laser development several applications. In this presentation, we will review progress CW, nanosecond, picosecond, femtosecond regimes. As our efforts amplifiers, compare large mode area (LMA)...
We demonstrate and characterize a highly linearly polarized (18.8 dB) narrow spectral emission (<80 pm) from an all-fiber Tm laser utilizing femtosecond-laser-written fiber Bragg gratings. Thermally-dependent anisotropic birefringence is observed in the FBG transmission, effects of which enable both generation elimination output. To our knowledge, this first detailed study such thermal femtosecond-written FBGs.
We present a model and design for high-power triple-clad thulium doped fiber specifically in-band or tandem pumping. This is designed to maximize the output signal power while taking into consideration common effects that limit operation. In-band pumping will allow lasers reach multi-kW levels.
Optical trapping of single biological cells has become an established technique for controlling and studying fundamental behavior with their environment without having "many-body" interference. The development such instrument optical diagnostics (including Raman fluorescence molecular diagnostics) via laser spectroscopy either the "trapping" beam or secondary beams is still in progress. This paper shows modular multi-spectral imaging tweezers combining Fluorescence cells.
Beam confinement or “no free-space optics” via fiber transmission can achieve improved reliability, lower cost, and reduced component count for active sensing systems. For midinfrared delivery, mechanically robust chalcogenide (arsenic sulfide) single-mode fibers are of interest. A 12-μm core diameter is shown to transport >10 W at 2053 nm, a 25-μm enables beam from 4550-nm quantum cascade laser. As sources continue increase their output power capabilities, will eventually be limited in...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text M. Gebhardt, C. Gaida, P. Kadwani, A. Sincore, N. Gehlich, L. Shah, and Richardson, "Nanosecond Tm:fiber MOPA System for High Peak Power Mid-IR Generation in a ZGP OPO," Advanced Solid-State Lasers Congress, Ebrahim-Zadeh I. Sorokina, eds., OSA Technical Digest (online) (Optica Publishing Group, 2013), paper MW3B.2. Export BibTex Endnote (RIS) HTML Plain alert Save article
An in-house drawn chalcogenide fiber sustained 12.2 MW/cm2 CW irradiation on the facet without damage, limited by available laser power. After depositing single-layer, anti-reflection coatings facets, 90.6% transmission was achieved with 10.2 W output.
We report on the performance of a prototype pump combiner for use with thulium-doped photonic crystal fiber (PCF). This platform is attractive "all-fiber" high energy and peak power laser sources at 2 μm. will this integrated amplifier in comparison to free space amplification Tm:PCF. In particular, we carefully look spectral/temporal modulation resulting from multimode interference between fundamental higher order transverse modes evaluate ultrashort chirped pulse amplification. The slope...
Thulium and holmium have become the rare earth dopants of choice for generating 2 micron laser light in silica fiber. The majority Tm:fiber lasers are pumped with high power diodes at 790nm rely upon cross-relaxation processes to achieve optical-to-optical efficiencies 55-65%. can also be <1900nm by another minimize quantum defect, reaching >90%. Ho:fiber similarly 1900-1950nm, <70% typical efficiency. In this work, in-band using same experimental setup directly compare their performance as sources.
We present a high-power DFB technology that meets the performance and volume demands of consumer automotive applications. Our design is hardened intended for use at extreme environmental conditions operates peak current density 8 kA/cm2 - approximately 4 times higher than more conventional lasers in telecommunication sensing demonstrate risks associated with placing these components into high production yield can be managed through careful control laser manufacturing processes. To date, we...
Thulium fiber lasers emit light of wavelengths spanning as low 1650nm to 2200nm. This broad emission band is in the "eye-safety" wavelength regime and intersects with IR atmospheric transmission window its opacity subsiding past 1900nm wavelength. Consequently, a high power, single frequency, tunable thulium laser tuning range from 2000nm has unique capability studying power beam propagation through atmosphere regions both weak strong transmission. Moreover, such can be made tune across...
An integrated thulium-doped photonic crystal fiber pump combiner is characterized for potential use in an ultrashort pulse amplifier. Spectral modulations were mitigated with amplification, and further investigations into coupling efficiencies gain are ongoing.