Intracavity coherent addition of Gaussian beam distributions using a planar interferometric coupler

Ishaaya, Amiel A.; Davidson, Nir; Shimshi, Liran; Friesem, Asher A.

doi:10.1063/1.1791330

Cited by 35 publications

(22 citation statements)

References 18 publications

(7 reference statements)

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“…The coupling is achieved by means of an external combiner (beam splitter) that merely transfers some energy from one laser to the other. Figure 1(b) shows a configuration in which the two lasers have a common output coupler, and the coupling is achieved by an intracavity combiner (again a beam splitter) that also introduces losses within the combined laser cavity [9,10]. Specifically, when there is no phase locking, part of the light from each laser is directed at the combiner into a loss channel.…”

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confidence: 99%

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Loss Enhanced Phase Locking in Coupled Oscillators

et al. 2008

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Phase locking, which is achieved by transferring some energy from one oscillator to the others, strongly depends on the coupling strength between the oscillators. Typically, the coupling strength must be above a certain threshold in order to achieve phase locking. Here we show how this threshold can be significantly reduced when phase-dependent losses are introduced into the oscillators. Specifically, the coupling strength can be reduced by at least an order of magnitude, thereby substantially decreasing the needed transfer of energy between oscillators. The resulting enhancement of phase locking does not only influence the laser research area, but also affects many other areas that involve coupled ensembles.

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confidence: 99%

“…The coupled lasers tend to operate such that losses are minimized, and phase locking is achieved. Indeed, the losses, which depend on the relative phases between the laser fields, enhance phase locking significantly, and the lasers add coherently with very high combining efficiency [9].…”

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confidence: 99%

Loss Enhanced Phase Locking in Coupled Oscillators

et al. 2008

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“…Experimental investigations have reported emission of inphase coherent light solely from the output reflector having the lowest losses. This form of single-facet emission has been studied primarily in arrays of solid-state and fiber lasers using interferometric coupling devices such as beam splitters [15,16], fold mirrors [14], or directional couplers [8,9,10,11,13,17]. In most realizations only one coupler output is fitted with a reflector to provide a global feedback for the entire array.…”

Section: Introductionmentioning

confidence: 99%

Coherence between two coupled lasers from a dynamics perspective

Ray¹,

Rogers²,

Wiesenfeld³

2009

Opt. Express

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“…This will ensure the existence of common longitudinal modes. Another approach for passive coherent beam combining, using plane-parallel intra-cavity interferometric combiners, was presented in 2004 [4]. This approach was successfully demonstrated with single, high-order, and even multi-mode laser beams [6].…”

Section: Introductionmentioning

confidence: 99%

Misalignment sensitivity in an intra-cavity coherently combined crossed-Porro resonator configuration

et al. 2017

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We investigate the misalignment sensitivity in a crossed-Porro resonator configuration when coherently combining two pulsed multimode Nd:YAG laser channels. To the best of our knowledge, this is the first reported study of this configuration. The configuration is based on a passive intra-cavity interferometric combiner that promotes self-phase locking and coherent combining. Detailed misalignment sensitivity measurements are presented, examining both translation and angular deviations of the end prisms and combiner, and are compared to the results for standard flat end-mirror configurations. The results show that the most sensitive parameter in the crossed-Porro resonator configuration is the angular tuning of the intra-cavity interferometric combiner, which is ~±54 µrad. In comparison, with the flat end mirror configuration, the most sensitive parameter in the resonator is the angular tuning of the output coupler, which is ~±11 µrad. Thus, with the crossed-Porro configuration, we obtain significantly reduced sensitivity. This ability to reduce the misalignment sensitivity in coherently combined solid-state configurations may be beneficial in paving their way into practical use in a variety of demanding applications.

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Intracavity coherent addition of Gaussian beam distributions using a planar interferometric coupler

Cited by 35 publications

References 18 publications

Loss Enhanced Phase Locking in Coupled Oscillators

Loss Enhanced Phase Locking in Coupled Oscillators

Coherence between two coupled lasers from a dynamics perspective

Misalignment sensitivity in an intra-cavity coherently combined crossed-Porro resonator configuration

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