Spectral Combining and Coherent Coupling of Lasers by Volume Bragg Gratings

Andrusyak, Oleksiy; Smirnov, Vadim; Venus, George; Rotar, Vasile; Glebov, Leonid

doi:10.1109/jstqe.2009.2012438

Cited by 100 publications

(42 citation statements)

References 42 publications

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“…Losses in general can be linked to finite divergences [28] and grating vector non-uniformities across the large aperture. However, the results ranging between 93% and 96% are comparable to the values achieved by others [22][23][24]. The temperature tuning of both lasers for optimum performance results in a wavelength separation of 0.5 nm (Fig.…”

Section: Spectral Beam Combining Of Two Tapered Diode Laserssupporting

confidence: 86%

“…These characteristics make volume Bragg gratings (VBG) suitable for compact and robust high power, high brightness, beam combining systems. In this respect a maximum of 770 W was achieved coupling 5 fiber lasers with a combining efficiency of 91.7% [24]. Comparable combining efficiencies of 92% -94% were achieved coupling 5 low power fiber-pigtailed diode lasers [22].…”

Section: Introductionmentioning

confidence: 93%

“…In these experiments five diode lasers as well as five fiber lasers emitting at around 1060 nm and spectrally spaced 0.5 nm were successfully combined. Written in photo-thermo-refractive (PTR) glass such gratings offer excellent thermomechanical properties, high transmittance in the visible and near-infrared, polarization insensitivity and diffraction efficiencies exceeding 99% [24]. These characteristics make volume Bragg gratings (VBG) suitable for compact and robust high power, high brightness, beam combining systems.…”

Section: Introductionmentioning

confidence: 99%

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16 W output power by high-efficient spectral beam combining of DBR-tapered diode lasers

Müller¹,

Vijayakumar²,

Jensen³

et al. 2011

Opt. Express

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Up to 16 W output power has been obtained using spectral beam combining of two 1063 nm DBR-tapered diode lasers. Using a reflecting volume Bragg grating, a combining efficiency as high as 93.7% is achieved, resulting in a single beam with high spatial coherence. The result represents the highest output power achieved by spectral beam combining of two single element tapered diode lasers. Since spectral beam combining does not affect beam propagation parameters, M 2 -values of 1.8 (fast axis) and 3.3 (slow axis) match the M 2 -values of the laser with lowest spatial coherence. The principle of spectral beam combining used in our experiments can be expanded to combine more than two tapered diode lasers and hence it is expected that the output power may be increased even further in the future.

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Section: Spectral Beam Combining Of Two Tapered Diode Laserssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

16 W output power by high-efficient spectral beam combining of DBR-tapered diode lasers

Müller¹,

Vijayakumar²,

Jensen³

et al. 2011

Opt. Express

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“…Volume Bragg gratings are widely used in simple externalcavity configurations for the wavelength locking and spectral narrowing of diode laser emission-for both single emitters and arrays [15]. A few papers have demonstrated spatial beam improvement by taking benefit of their angular-filtering properties [10,15].…”

Section: B Properties Of Volume Bragg Gratingsmentioning

confidence: 99%

“…A few papers have demonstrated spatial beam improvement by taking benefit of their angular-filtering properties [10,15]. We have recently demonstrated experimentally that these components can also be used for the phase locking of an array of diode lasers [16].…”

Section: B Properties Of Volume Bragg Gratingsmentioning

confidence: 99%

Volume Bragg grating external cavities for the passive phase locking of high-brightness diode laser arrays: theoretical and experimental study

et al. 2011

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We describe the theoretical modeling of the external-cavity operation of a phase-locked array of diode lasers in two configurations, the self-imaging cavity based on the Talbot effect and the angular-filtering cavity. Complex filtering functions, such as the transmission or reflection of a volume Bragg grating (VBG), may be introduced in the external-cavity description. Experiments with high-brightness diode laser arrays were also conducted. The experimental results are carefully analyzed with regard to the numerical simulations, and the beneficial effect of the spectral selectivity of VBGs is demonstrated.

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