High-brightness output from a laser-diode array coupled to a phase-conjugating mirror

MacCormack, Stuart; Feinberg, Jack

doi:10.1364/ol.18.000211

Cited by 38 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the IR and near IR regions, these materials find useful applications such as diode laser beam combining, injection-locking semiconductor diode arrays, correcting semiconductor laser modes using phase-conjugating mirrors and brightness enhancement [2]. Barium titanate doped with rhodium (Rh:BaTiO 3 ) is a potential photorefractive material in the IR and near IR regions [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of rhodium doping on the growth and characteristics of BaTiO3 single crystals grown by step-cooling method

Madeswaran¹,

Giridharan²,

Varatharajan³

et al. 2004

Journal of Crystal Growth

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Effect of rhodium doping on the growth and characteristics of BaTiO3 single crystals grown by step-cooling method

Madeswaran¹,

Giridharan²,

Varatharajan³

et al. 2004

Journal of Crystal Growth

View full text Add to dashboard Cite

“…A common way to improve the spatial and/or temporal coherence of the LD is the use of off-axis external reflectors such as conventional mirrors [10][11][12][13][14], diffraction gratings [16,17], or phase conjugators [17][18][19] combined with spatial and/or spectral filtering. When applying feedback from an ordinary mirror, only the spatial coherence is distinctly improved.…”

Section: Introductionmentioning

confidence: 99%

Improvement of spatial and temporal coherence of a broad area laser diode using an external-cavity design with double grating feedback

Samsøe¹,

Andersen²,

Andersson‐Engels³

et al. 2004

Opt. Express

View full text Add to dashboard Cite

Abstract:We demonstrate a novel technique for narrow bandwidth and highly improved lateral mode operation of a high-power broad area laser diode. The system uses simultaneous feedback from the first diffracted order and the zeroth reflected order of a diffraction grating. The two feedback paths lead to simultaneously improvement of the spectral and spatial properties of the laser diode. The laser system operates in the well-known asymmetric double-lobed far field pattern with the larger lobe being extracted as the output. The bandwidth of the output beam is measured to 0.07 nm, which corresponds to an improvement of a factor of 17 compared to the bandwidth of the freely running laser. The output from the system contains 54 % of the energy reaching the grating, or 75% of the power reflected into the zeroth order. The improvements in both the spatial and temporal coherence opens the possibility of using this laser system in applications such as frequency doubling and pumping of optical parametric oscillators.

show abstract

“…Phase conjugate feedback generated from an incident beam, however, has been shown to enhance the coherence properties of high-power laser diodes. [1][2][3][4] In these experiments, [1][2][3][4] the optical phase conjugate feedback was generated by selfpumped four-wave mixing in barium titanate arranged in a Cat geometry, 5 in which the beam undergoes total internal reflection in the crystal. This conjugator device is compact, simple, and self-starting which is very attractive from an experimental and a technological point of view.…”

Section: Introductionmentioning

confidence: 99%

Wavelength selectivity of the complex grating structure formed in a photorefractive phase conjugator

bel

1998

Journal of Applied Physics

View full text Add to dashboard Cite

Experimental results show that the wavelength selectivity and the shape of the detuning curve of the complex grating structure formed in a photorefractive self-pumped BaTiO 3 phase conjugator depend strongly on the coherence length of the incident beam. It is observed that the wavelength selectivity becomes larger as the coherence length of the incident beam is decreased. With a coherence length much longer than the dimensions of the conjugator crystal a wavelength selectivity of 0.026 nm is measured. It is shown that this very small wavelength selectivity and the experimental detuning curves are in agreement with a simple model that takes into account the interference between light reflected in 2k gratings and light that has traveled one round trip in the internal loop of the conjugator crystal. The findings explain how the optical feedback generated by the dynamic gratings in the phase conjugator can increase the coherence length of a multimode laser.

show abstract

High-brightness output from a laser-diode array coupled to a phase-conjugating mirror

Cited by 38 publications

References 11 publications

Effect of rhodium doping on the growth and characteristics of BaTiO3 single crystals grown by step-cooling method

Effect of rhodium doping on the growth and characteristics of BaTiO3 single crystals grown by step-cooling method

Improvement of spatial and temporal coherence of a broad area laser diode using an external-cavity design with double grating feedback

Wavelength selectivity of the complex grating structure formed in a photorefractive phase conjugator

Contact Info

Product

Resources

About