CW Room-Temperature Blue Upconversion Laser

Grubb, S.G.; Bennett, Kelly W.; Cannon, Rachel; Humer, W.F.

doi:10.1364/opn.3.12.000040

Cited by 10 publications

(5 citation statements)

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“…The upconversion efficiency is increased with the use of (i) fluoride materials with low phonon frequency to reduce the multiphonon de-excitation of excited ions, (ii) optical fibers to maintain a high pump intensity over a long interaction length, and (iii) high concentration of excited ions. Blue upconversion fibers lasers have already been realized with Tm 3+ -(450-480 nm) or Pr 3+ -(490 nm) doped ZBLA fiber [1][2][3]. Although various Er 3+ -doped fluoride crystal lasers have been reported [4,5], a blue Er 3+ ZBLA fiber laser is yet to be realized.…”

Section: Introductionmentioning

confidence: 99%

Blue Upconversion Emission in Er3+-Doped Fluoride Fiber

Saissy

Dussardier

Mazé

et al. 1996

Optical Fiber Technology

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Section: Introductionmentioning

confidence: 99%

Blue Upconversion Emission in Er3+-Doped Fluoride Fiber

Saissy

Dussardier

Mazé

et al. 1996

Optical Fiber Technology

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“…And the upconversion phenomenon was first observed experimentally in later years by Francois Azuel [7] . It is a kind of photoluminescence with a nonlinear optical process [8,9] , in which lower-energy photons stimulate the emission of higher-energy photons. To ensure the energy conservation principle in this process, two or more excitation photons are required for each emission photon.…”

Section: Upconversion Mechanisms 21 Upconversion Luminescencementioning

confidence: 99%

Recent progress of rare earth doped upconversion nanoparticles

Liu

2023

International Conference on Optoelectronic Materials and Devices (ICOMD 2022)

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Due to their unique optical properties, rare earth doped Upconversion Nanoparticles (UCNPs) are experiencing fast momentum nowadays. They have excellent physical and chemical characteristics, including great penetration depth and high chemical stability, etc. which make them widely used in many different fields. In this review, the development and process of upconversion luminescence were described briefly. The latest literature was listed to explicate the special properties in these kinds of materials and their applications for temperature sensing, bioimaging, drug delivery, latent fingerprinting detection, and anti-counterfeiting. Finally, the limitations and prospects of UCNPs are introduced, providing a more comprehensive view of rare earth doped UCNPs and draw more attention.

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“…Very recently however Tm:ZBLAN has been shown 13 to have excellent upconversion laser performance when infrared pumped via the three photon route described above, but using longer wavelength pump radiation (-1.12Jlm) to enhance the absorption cross section on the pumping stages.…”

Section: F5i2mentioning

confidence: 99%

Fibre Lasers

Hanna

1993

NATO ASI Series

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INTRODUCTIONThe first fibre laser, described by Snitzer!, was also the first glass laser. The glass fibre, doped with trivalent neodymium ions (Nd3+) was transversely pumped by a flash lamp. The fibre geometry was chosen to exploit the brightness enhancement of pump light in the core after passing through the clear cladding, and also to provide a structure which was more forgiving of the optical inhomogeneities of the doped glass 2 . These early fibres clearly demonstrated the capability for very high gain, with 47dB measured 3 at 1.063~m, even if the transverse pumping geometry was of very low efficiency.The next major development was the demonstration that longitudinal pumping, using a laser as the pump source and end-launching the pump light into the doped core, gave greatly reduced threshold, and high efficiency4. In this way cw operation was easily obtained and it was recognised that pumping of Nd-doped fibre using laser diodes operating at -O. 8~m would provide a simple and practical form of fibre laser.The third major development, coming 12 years later, and which initiated an enormous growth of interest in fibre lasers and amplifiers, was the demonstration of lasing and amplification in rare-earth-doped mono mode silica fibres 5 ,6. The erbiumdoped fibre amplifier (EDFA) has been the main reason for this explositon of interest. Its success is based on the fact that erbium-doped silica fibre offers an amplifying transition 7 at -1.5~m, matching perfectly to the third telecommunications window, in a fibre which is compatible with telecom fibre, and which can be readily pumped by a diode laser to give high gain (in excess of 30dB, i.e. an intensity gain of 1000). These, and other attractive features of EDFAs have revolutionised the field of optical fibre communications.While the EDFA has received the greatest share of attention, there is also a growing appreci.ation that fibre lasers and amplifiers have a great deal more to offer. For example, as a result of developments in fibres based on heavy metal fluoride Solid State Lasers' New Developments and ApplicatIOnsEdtted by M IngusclO and R Wallen stem, Plenum Press, New York, 1993 231 glasses, there are now seen to be very exciting prospects for compact, visible, sources in the form of blue, green and red fibre lasers pumped by infrared diode lasers 8 -13 • There is also a growing realisation that while fibre lasers may have very low threshold pump powers, this does not imply that they are necessarily low power devices and indeed it has been demonstrated that powers in excess of 1 watt are achievable from diode-pumped fibre lasers l4 • The broadened lines of rare-earth ions in glasses means that significant tuning ranges are available, in some cases l5 broader than the range typically offered by a dye laser, and yet despite this broad linewidth it has been possible to demonstrate very narrow linewidth operation (a few kHz) in single-frequency fibre lasers16. By contrast, on the other hand, the high gain can allow "mirrorless lasing", resulting in a broad, mode...

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CW Room-Temperature Blue Upconversion Laser

Cited by 10 publications

References 0 publications

Blue Upconversion Emission in Er3+-Doped Fluoride Fiber

Blue Upconversion Emission in Er3+-Doped Fluoride Fiber

Recent progress of rare earth doped upconversion nanoparticles

Fibre Lasers

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