Diode-Pumped Fluorescence in Visible Range From Femtosecond Laser Inscribed Pr:LuAG Waveguides

Trivalent praseodymium (Pr3+) is the most established rare-earth ion for the direct generation of visible light. In our work, based on Pr-doped Lu3Al5O12 (LuAG) single crystal, cladding waveguides are fabricated by applying femtosecond laser inscription with different parameters. The main characteristics of the waveguides such as mode distributions, propagation losses are investigated. The investigations on confocal micro-photoluminescence enable us to illustrate femtosecond laser induced modifications in Pr:LuAG matrix. The waveguides are further pumped at a wavelength of 450 nm with an InGaN laser diode. Guided fluorescence emissions in visible range covering green, yellow-green, orange and red are obtained with a maximum slope efficiency of 4 × 10−4.

Download Full-text

Multilayer optical memory using femtosecond-laser induced fluorescence in rare-earth ion doped glass

Applied Physics A ◽

10.1007/s00339-008-4662-4 ◽

2008 ◽

Vol 93 (1) ◽

pp. 215-218 ◽

Cited By ~ 5

Author(s):

Ki-Soo Lim ◽

Jongho Shin ◽

Kyungsik Jang ◽

Sunkyun Lee ◽

Douglas S. Hamilton

Keyword(s):

Rare Earth ◽

Femtosecond Laser ◽

Optical Memory ◽

Laser Induced Fluorescence ◽

Rare Earth Ion ◽

Doped Glass

Download Full-text

High slope efficiency and low threshold in a laser-diode-pumped passively Q-switched ion-implanted Nd:YVO4 planar waveguide laser with GaAs saturable absorber

Laser Physics ◽

10.1134/s1054660x1119008x ◽

2011 ◽

Vol 21 (11) ◽

pp. 1880-1883 ◽

Cited By ~ 4

Author(s):

G. L. Du ◽

G. Q. Li ◽

S. Z. Zhao ◽

T. Li ◽

K. J. Yang ◽

...

Keyword(s):

Saturable Absorber ◽

Laser Diode ◽

Slope Efficiency ◽

Planar Waveguide ◽

Waveguide Laser ◽

High Slope ◽

Diode Pumped ◽

Low Threshold ◽

Ion Implanted

Download Full-text

Electroluminescent Textiles using Sputter-deposited Amorphous Nitride-Rare-Earth Ion Coatings

MRS Proceedings ◽

10.1557/proc-736-d1.8 ◽

2002 ◽

Vol 736 ◽

Cited By ~ 1

Author(s):

M. E. Kordesch ◽

Hugh H. Richardson

Keyword(s):

Rare Earth ◽

Light Emission ◽

Ambient Air ◽

Deposition Process ◽

Visible Range ◽

Bandgap Engineering ◽

Rare Earth Ion ◽

Group Iii ◽

Bandgap Semiconductors ◽

Sputter Deposited

Wide bandgap semiconductors have been sputter deposited onto non-crystalline substrates, low melting point materials, including polymer fibers, textiles and glasses. The semiconductors are amorphous and can be deposited over large (square meter) areas economically. The electro-optical properties of these materials are not defect limited, and do not require thermal processing. Alternating current electroluminescent device structures/coatings composed of rare-earth ion doped nitrides have been deposited onto point-bonded fabrics, polymer membranes, and polymer sheets. Light emission is detected from the coated fabrics over the entire visible range, UV and IR. A notable feature of fabric-based structures is the inclusion of ambient air in the fabric voids. Increased light emission intensity is obtained by extracting electrons from the plasma discharge during device operation. These fabrics do not require weaving, which could be difficult with semi-crystalline or brittle semiconductor materials. Multilayer assembly and bonding with continuous sheets, cladding, filling and or contact bonding are all available at any point in the fabric assembly. Non-woven, pin-bonded, materials may still function after some damage, e.g. rips or punctures, due to redundant connections at each pad. Further advantages are the simple incorporation of optically active ions, such as rare earths, high thermal conductivity, high breakdown voltage, and complete miscibility of the group III-A and -B nitrides, allowing bandgap engineering. The deposition process is scalable and may be applied to the fibers or yarns before or after fabric formation.

Download Full-text

Structure, Luminescence, and Magnetic Properties of Crystalline Manganese Tungstate Doped with Rare Earth Ion

Materials ◽

10.3390/ma14133717 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3717

Author(s):

Jae-Young Jung ◽

Soung-Soo Yi ◽

Dong-Hyun Hwang ◽

Chang-Sik Son

Keyword(s):

Magnetic Field ◽

Rare Earth ◽

Sintering Temperature ◽

Luminescent Properties ◽

Concentration Quenching ◽

Rare Earth Ions ◽

Precipitation Method ◽

Rare Earth Ion ◽

Co Precipitation ◽

Quenching Phenomenon

The precursor prepared by co-precipitation method was sintered at various temperatures to synthesize crystalline manganese tungstate (MnWO4). Sintered MnWO4 showed the best crystallinity at a sintering temperature of 800 °C. Rare earth ion (Dysprosium; Dy3+) was added when preparing the precursor to enhance the magnetic and luminescent properties of crystalline MnWO4 based on these sintering temperature conditions. As the amount of rare earth ions was changed, the magnetic and luminescent characteristics were enhanced; however, after 0.1 mol.%, the luminescent characteristics decreased due to the concentration quenching phenomenon. In addition, a composite was prepared by mixing MnWO4 powder, with enhanced magnetism and luminescence properties due to the addition of dysprosium, with epoxy. To one of the two prepared composites a magnetic field was applied to induce alignment of the MnWO4 particles. Aligned particles showed stronger luminescence than the composite sample prepared with unsorted particles. As a result of this, it was suggested that it can be used as phosphor and a photosensitizer by utilizing the magnetic and luminescent properties of the synthesized MnWO4 powder with the addition of rare earth ions.

Download Full-text