Nanostructured glass-crystal materials with lead sulfide for passive Q switching of IR lasers

Onushchenko, A. A.; Жилин, А. А.; Petrovskiĭ, G. T.; Raaben, E.; Gaponenko, Maxim; Malyarevich, A. M.; Yumashev, K. V.; Golubkov, V. V.

doi:10.1364/jot.73.000576

Cited by 24 publications

(12 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SAM used for passive mode locking of the laser was prepared by the diffusion bonding technique from the 10 nm PbS QDs-doped glass sample (produced by the batch-melting technique described elsewhere [12]) and a pure glass substrate. The PbS-doped glass was polished to ∼ 300 μm in order to achieve the value of internal transmission T 0 = 95% in a region of the lasing wavelength, and its face was AR coated.…”

Section: Methodsmentioning

confidence: 99%

Passive mode locking of diode-pumped Tm:KYW laser with PbS quantum-dot-doped glass

et al. 2010

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 99%

Passive mode locking of diode-pumped Tm:KYW laser with PbS quantum-dot-doped glass

et al. 2010

View full text Add to dashboard Cite

show abstract

“…In this case, from compounds added to the mix as impurities (usually lead oxide and the corresponding chalcogenides), the quantum dots nucleate and grow over the course of phase separation and crystallization. On the whole, despite the existence of sufficiently developed theoretical ideas about the indicated processes (see, for example, the analysis in [100]), for each specific glassy system we need detailed experimental study of the kinetics of structural transformations and the characteristic features of the structures formed. Such studies make it possible to control the properties of the material, which determine its practical application, in a targeted fashion.…”

Section: Spectroscopic Properties Of Lead Chalcogenide Quantum Dots mentioning

confidence: 99%

Nonlinear bleachable media for the near IR range based on lead chalcogenide quantum dots (review)

Malyarevich

Yumashev

2007

J Appl Spectrosc

Self Cite

View full text Add to dashboard Cite

We present a review of results from study of the nonlinear optical properties and relaxation processes in lead chalcogenide quantum dots embedded in glass matrices of various compositions, and also designs for bleachable media based on these materials for Q-switched and mode-locked solid-state lasers in the near IR range. We consider the conditions which should be satisfied by the spectroscopic characteristics of saturable absorbers for realization of passive Q-switching and mode-locking in solid-state lasers.Introduction. Nanometer-sized semiconductor particles (quantum dots (QDs)) are among systems with pronounced quantum effects, caused by confinement of the motion of the electrons and holes by the finite dimensions of the nanoparticle [1][2][3][4]. If the dimensions of the quantum dot are comparable with the Bohr exciton radius in a bulk semiconductor, then we observe a shift of the optical absorption edge of the quantum dot toward higher energies relative to the bandgap width of the bulk semiconductor. To a first approximation, the magnitude of this shift is inversely proportional to the square of the quantum dot radius. Furthermore, the quantum dot absorption spectrum has structure: individual bands appear due to splitting of the valence band and the conduction band into individual energy levels, between which there are certain optical transitions with selection rules. As a result, it becomes possible to monotonically shift the quantum dot absorption edge toward shorter wavelengths, starting from the wavelength corresponding to the bandgap width of the semiconductor compound. Thus semiconductors with a relatively narrow bandgap, in particular lead chalcogenides, make it possible to shift the absorption edge within practically the entire near IR region of the spectrum, by varying the size of the quantum dot. The effect of an increase in transmission (bleaching) in the region of the quantum dot absorption bands upon resonant interaction with an intense light beam allows us to use quantum dots as bleachable media (saturable absorbers) to control the temporal parameters of emission from laser systems.Bleachable media, using the effect of saturation of optical absorption, have become widely used to obtain high-power light pulses of short/ultrashort duration in Q-switched and mode-locked solid-state lasers emitting in the near IR region of the spectrum. Using such laser pulses provides broad possibilities for treatment of materials, information transfer, ranging, monitoring for occurrence of industrial processes, environmental monitoring, biomedical diagnostics, laser surgery and therapy, and also in science (especially in nonlinear optics and laser spectroscopy). Practical application requires laser systems that operate reliably, are easy to service, compact, and low-cost. A solid-state bleachable medium as a component of a laser system sufficiently meets the indicated requirements. This component is usually a plate or film (on a substrate) made from a solid material, and does not require any external mechanical...

show abstract

“…One of the most promising methods to tailor fast saturable absorbers uses nanostructures, such as PbS nanocrystals [1] or single-wall carbon nanotubes [2,3] embedded in various host materials. PbS nanocrystals in a silicate or a phosphate glass matrix are ideal candidates for the near-infrared region.…”

mentioning

confidence: 99%

“…Their laser characteristics and their thermal properties are superior to those of Nd:YAG and, therefore, they are promising substitutes for diodepumped Nd:YAG lasers. For example, an a-cut Nd:GdVO 4 crystal has a seven times larger absorption cross-section (5.2 · 10 −19 cm 2 , E||c-axis) and a three times larger emission cross-section at 1.06 µm (7.6 · 10 −19 cm 2 , E||c-axis) (1) refer to the a-cut and the solid curves (2) to the c-cut crystals, respectively compared to Nd:YAG [12]. The room temperature thermal conductivity of 11.7 W m −1 K −1 in the direction parallel to the c-axis for a 1.3 at.% Nd:GdVO 4 crystal exceeds the 11.1 W m −1 K −1 of a 0.9 at.% Nd:YAG crystal.…”

mentioning

confidence: 99%

Mode-locked diode-pumped vanadate lasers operated with PbS quantum dots

et al. 2009

Self Cite

View full text Add to dashboard Cite

The use of glasses doped with PbS nanocrystals as intracavity saturable absorbers for passive Q-switching and mode locking of c-cut Nd:Gd 0.7 Y 0.3 VO 4 , Nd:YVO 4 , and Nd:GdVO 4 lasers is investigated. Q-switching yields pulses as short as 35 ns with an average output power of 435 mW at a repetition rate of 6-12 kHz at a pump power of 5-6 W. Mode locking through a combination of PbS nanocrystals and a Kerr lens results in 1.4 ps long pulses with an average output power of 255 mW at a repetition rate of 100 MHz.

show abstract

Nanostructured glass-crystal materials with lead sulfide for passive Q switching of IR lasers

Cited by 24 publications

References 0 publications

Passive mode locking of diode-pumped Tm:KYW laser with PbS quantum-dot-doped glass

Passive mode locking of diode-pumped Tm:KYW laser with PbS quantum-dot-doped glass

Nonlinear bleachable media for the near IR range based on lead chalcogenide quantum dots (review)

Mode-locked diode-pumped vanadate lasers operated with PbS quantum dots

Contact Info

Product

Resources

About