AdValue Photonics, Inc. | Date: 2015-07-17
Ultrashort pulse fiber amplifier having a pulse width from 200 ps to 200 fs comprising a rare earth oxide doped multicomponent glass fibers for laser amplification, including a core and a cladding, the core comprising at least 2 weight percent glass network modifier selected from BaO, CaO, MgO, ZnO, PbO, K_(2)O, Na_(2)O, Li_(2)O, Y_(2)O_(3), or combinations; wherein the mode of the core is guided with step index difference between the core and the cladding, a numerical aperture of the fiber is between 0.01 and 0.04; core diameter is from 25 to 120 micron, and a length of the gain fiber is shorter than 60 cm.
AdValue Photonics, Inc. | Date: 2015-01-26
Rare earth oxides doped multicomponent glass fibers for laser generation and amplification, including a core and a cladding, the core comprising at least 2 weight percent glass network modifier selected from BaO, CaO, MgO, ZnO, PbO, K_(2)O, Na_(2)O, Li_(2)O, Y_(2)O_(3), or combinations; wherein the mode of the core is guided with step index difference between the core and the cladding, a numerical aperture of the fiber is between 0.01 and 0.04; core diameter is from 25 to 120 micron, and a length of the gain fiber is shorter than 60 cm.
Agency: Department of Defense | Branch: Missile Defense Agency | Program: SBIR | Phase: Phase I | Award Amount: 99.85K | Year: 2016
This project is to develop low loss bi-directional fiber tap couplers for high power fiber laser weapon systems with long term power handling beyond 1kW per channel, which can be integrated with Ytterbium ~1064nm and Thulium ~2000nm fiber laser systems. In Phase I, we will design a kilowatt capable fiber optic tap coupler and packaging for large mode area double clad fiber as well as photonic crystal and photonic band gap gain fibers. Criteria for the design includes bi-directional power handling capability, polarization, phase and path length pick-off with robust packaging.
Agency: National Aeronautics and Space Administration | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 122.81K | Year: 2016
Atmospheric methane is the second most important anthropogenic greenhouse gas. The overtone lines of methane at 1.65 micron are well suited for remote sensing of atmospheric methane in the Earth's atmosphere. NASA have already demonstrated ground-based and airborne methane detection using Optical Parametric Amplifiers at 1651 nm using a laser with a narrow linewidth. In this setup a single frequency pulsed laser near 1 micron wavelength with several mJ pulse energy is needed. We propose to develop a compact pulsed single frequency fiber laser with greater than 3mJ pulse energy and 30ns pulse width using our innovative Yb-doping fiber. Highly efficient Yb doped glasses will be developed, double cladding fibers will be designed and fabricated, the amplifier performance will be characterized. In Phase II we will build a deliverable prototype high energy and high peak power fiber laser system for NASA.
Agency: National Aeronautics and Space Administration | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 124.29K | Year: 2016
The laser absorption spectrometer approach offers the potential to provide the high-accuracy carbon dioxide mixing ratio measurements with the vertical and horizontal spatial resolution that is desired by the carbon cycle research community. It is generally agreed that 2.05 micron wavelength absorption band of carbon dioxide can offer good differential absorption optical depth. An amplifier with output power of 15W is needed to burst the output power for airborne and space applications. We propose to develop a high average power polarization maintaining single frequency Ho-doped 2.05 micron wavelength fiber amplifier with output power of 15W by developing innovative radiation hardened Ho/Tm-co-doped silicate glass fiber. In Phase I we will demonstrate radiation hardened Ho/Tm co-doped silicate glass fibers, and PM fiber amplifier with greater than 10W output power.
Agency: National Aeronautics and Space Administration | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 123.26K | Year: 2015
In this proposal, we propose to demonstrate and build high pulse energy near 1.55 micron wavelength single frequency fiber laser by developing an innovative polarization maintaining Er-doped gain fiber with extremely large mode field diameter. Such a single frequency high energy and high peak power fiber laser is needed for coherent lidar and sensing. We will enhance the radiation resistance of the gain fiber in order to make it suitable for NASA's applications. In Phase I, we will design and fabricate Er-doped glasses, fiber preforms, and fibers. High pulse energy will be demonstrated. This proposed system will be all-fiber based, which offers excellent reliability. Successful demonstration of such a fiber laser can enable many new NASA and commercial applications.
Agency: National Aeronautics and Space Administration | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 124.85K | Year: 2015
Thulium doped fiber laser near 2 micron is of great interest because of the prospect of combining high efficiency, high output power, and retina safety together. This proposal is for the development of highly efficient 1.94 micron fiber laser as the pumping source of Ho doped crystal lasers for LASA's lidar applications. New Tm-doped glasses and fibers will be developed, high efficient fiber lasers will be demonstrated, and a new laser configuration suitable for NASA's application will be designed and demonstrated.
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 994.06K | Year: 2015
To address the DoE need for a high-power laser source used for synchronous photoinjection of GaAs photoemission guns, AdValue Photonics proposes to develop a radio-frequency synchronized 100W mode-locked green laser source at a GHz rate. Previously-demonstrated GHz-rate modelocked solid-state/fiber lasers suffer from a reliability issue due to the use of fragile free-space bulk optics for their laser cavities. We propose to develop an all-fiber high-power laser system, which can be synchronized to an external GHz-rate reference signal. Our proprietary high-efficiency rareearth- doped glass fiber technology enables us to develop a robust high-power GHz-rate modelocked fiber laser system. In the Phase I effort, several key concepts of the proposed technology have been demonstrated. The major Phase I achievements include the demonstration of a GHz-rate mode-locked Yb-doped fiber laser, the demonstration of nearly 100W laser out power amplification and >10J-level femtosecond chirped pulse amplification with >20dB gain in 20-30cm long Yb-doped fiber. With these well-demonstrated concepts, we will be able to develop and prototype a highly reliable, compact, high-power, mode-locked green laser for GaAs photoemission guns application. In the Phase II program, we will focus on engineering design for a robust high-power GHz-rate modelocked Yb-doped fiber laser system with a special emphasis on synchronizing the mode-locked laser pulses to an external RF reference signal. The proposed technology will provide a robust light source not only for applications in DoE advanced accelerators, but also for many other scientific and industrial applications, such as optical arbitrary waveform generations, ultra-stable microwave references, telecommunications, material processing, medical surgery, high harmonic generation, and frequency comb spectroscopy.
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase II | Award Amount: 999.51K | Year: 2014
ABSTRACT: Coherent imaging systems have the capability to provide high-resolution 3D imagery for target identification at stand-off ranges. These systems require relatively short pulse width, transform-limited linewidth pulsed lasers with high pulse energy to illuminate the target of interest. Here we proposed to demonstrate and build near 1550nm single frequency fiber laser with pulse energy of greater than 10mJ and pulse width of 30ns to 300ns by using our innovative Er-doped glass fibers. The laser beam should have near diffraction limited beam quality to reach the desired targets and detectors. BENEFIT: This proposed single frequency high energy and high peak power fiber laser can be used as innovative lidar component for wind lidar, measurements of the atmosphere and gas contents of the Earth, and ranging. It also can be used as light source for optical sensing.
Agency: Department of Defense | Branch: Air Force | Program: STTR | Phase: Phase I | Award Amount: 148.90K | Year: 2015
ABSTRACT: The development of mid-infrared (Mid-IR) transparent fibers having low propagation loss in the wavelength range 2-5 micron, robust mechanical properties, low temperature sensitivity and high laser power delivery capability has been investigated extensively in the last decade. Chalcogenide glass fibers, fluoride glass fibers, tellurite glass fibers, and microstructured silica fibers have been studied in details by many groups around the world. Here we propose to develop an innovative robust mid-IR optical fiber to meet this difficult challenge. During Phase I we will demonstrate this innovative technical approach by fabricating and characterizing fibers. In Phase II we shall demonstrate production of mid-IR fiber for transport of high power (> 100 W) laser output in the 2-5 micron region with less than 0.3dB/m loss, with bend radii