Tunable alexandrite lasers

Walling, J. C.; Peterson, O. G.; Jenssen, H. P.; Morris, Robert C.; O'Dell, E. W.

doi:10.1109/jqe.1980.1070430

Cited by 424 publications

(136 citation statements)

References 26 publications

Supporting

Mentioning

129

Contrasting

Order By: Relevance

“…Alexandrite structure is of chrysoberyl type with the incorporation of chrome in its lattice, according to the chemical formula: BeAl 2 O 4 :Cr 3+ . This material became technologically important from 1974, when its utilization as an active media for laser action became known, through the utilization in a synthetic form [1]. Alexandrite emission can be tuned in the range 700-800nm [2].…”

Section: Introductionmentioning

confidence: 99%

Cr+3 Distribution in Al1 and Al2 Sites of Alexandrite (BeAl2O4: Cr3+) Induced by Annealing, Investigated by Optical Spectroscopy

Trindade¹,

Scalvi

Scalvi³

2010

EPE

View full text Add to dashboard Cite

Abstract:In order to investigate optical properties of alexandrite, the present work deals with the influence of thermal annealing on optical absorption and luminescence spectra of natural samples. The exposure time to heat treatment at 1000 o C is taken into account. Possible migration of Cr 3+ ions from Al 1 (inversion site) to Al 2 (reflection site) is detected. Sample composition is obtained through Scanning Electron Microscopy (SEM) measurements and points to a rearrangement of Cr +3 and Fe 3+ ions in the alexandrite crystalline structure, under thermal annealing influence. This feature may be used to control the optical properties of natural alexandrite, which can be associated to the observed laser emission effect.

show abstract

Section: Introductionmentioning

confidence: 99%

Cr+3 Distribution in Al1 and Al2 Sites of Alexandrite (BeAl2O4: Cr3+) Induced by Annealing, Investigated by Optical Spectroscopy

Trindade¹,

Scalvi

Scalvi³

2010

EPE

View full text Add to dashboard Cite

show abstract

“…where (w/a r ) 2 . represents the overlap efficiency and ln(R M )/ln(R M R L ) is the fraction of extracted photons that appear in the laser output .…”

Section: Extraction Efficiencymentioning

confidence: 99%

“…The second innovation was the invention of tunable solid state lasers, such as Cr:BeAl 2 O 4 [2] and Ti:Al 2 O 3 lasers [3]. Although tunable lasers such as Ni:MgF 2 and Co:MgF 2 [4] were discovered earlier, their low gain and cryogenic cooling discouraged wide acceptance Conversely, Cr:BeAl 2 O 4 operated in the near visible region at room temperature and was reasonably efficient for a flash lamp pumped laser.…”

Section: Introductionmentioning

confidence: 99%

Solid-State Lasers From an Efficiency Perspective

Barnes

2007

IEEE J. Select. Topics Quantum Electron.

View full text Add to dashboard Cite

Solid state lasers have remained a vibrant area of research because several major innovations expanded their capability. Major innovations are presented with emphasis focused on the laser efficiency. A product of efficiencies approach is developed and applied to describe laser performance. Efficiency factors are presented in closed form where practical and energy transfer effects are included where needed. In turn, efficiency factors are used to estimate threshold and slope efficiency, allowing a facile estimate of performance. Spectroscopic, thermal, and mechanical data are provided for common solid state laser materials.Index terms: Solid state lasers, laser efficiency, diode pumped solid state lasers, laser modeling Introduction:Solid state lasers remain a vibrant area because of several innovations in technology and because they have capabilities available with no other type of laser. These innovations have opened up fruitful new areas for solid state laser research. Directly below, 4 major innovations appear with other innovations scattered throughout the text. Some important solid state laser capabilities result from their ability to store energy. Efficient energy storage for millisecond time intervals is unique to solid state lasers. Energy storage permits solid state lasers to serve as optical integrators. Low brightness optical pumps can be optically integrated and laser energy delivered in a high peak power and high brightness laser beam. This capability of solid state lasers is a prime reason for their utility.

show abstract

“…Alexandrite (Cr 3+ :BeAl 2 O 4 ) is a solid-state laser crystal with excellent thermo-mechanical properties and a long upper state lifetime (~260 µs) [1]. It can operate on a vibronic transition, giving continuously wavelength tunable operation with a demonstrated range of 701 nm to 858 nm [2].…”

Section: Introductionmentioning

confidence: 99%

Analytical model of tunable Alexandrite lasing under diode end-pumping with experimental comparison

Kerridge-Johns¹,

Damzen²

2016

J. Opt. Soc. Am. B

View full text Add to dashboard Cite

An analytical model is formulated to support understanding and underpin experimental development of laser action in the promising diode end-pumped Alexandrite system. Closed form solutions are found for output power, threshold and slope efficiency that for the first time incorporate the combined effects of laser ground state absorption (GSA) and excited state absorption (laser ESA), along with pump excited state absorption (pump ESA), in the case of an end-pumping geometry. Comparison is made between model predictions and experimental results from a fibre-delivered diode end-pumped Alexandrite laser system, showing the impact of wavelength tuning, crystal temperature, laser output coupling, and intracavity loss. The model is broadly applicable to other quasi-three-level lasers with combined laser and pump ESA. A condition for bistable operation is also formulated.

show abstract

Tunable alexandrite lasers

Cited by 424 publications

References 26 publications

Cr+3 Distribution in Al1 and Al2 Sites of Alexandrite (BeAl2O4: Cr3+) Induced by Annealing, Investigated by Optical Spectroscopy

Cr+3 Distribution in Al1 and Al2 Sites of Alexandrite (BeAl2O4: Cr3+) Induced by Annealing, Investigated by Optical Spectroscopy

Solid-State Lasers From an Efficiency Perspective

Analytical model of tunable Alexandrite lasing under diode end-pumping with experimental comparison

Contact Info

Product

Resources

About