Phase locking of laser array

Zhou, Yi; Liu, Liping; Kong, Fanting; Chen, Y. C.; Peng, Qingjun; Sun, Zhipei; Xu, Zuyan; Wang, Yisan; Li, Kang; Zhao, Wei; Lee, Kotik K.

doi:10.1117/12.667115

Cited by 2 publications

(2 citation statements)

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“…In this paper, we established a laser combination array of several individual Gaussian beams with a near-field intensity profile arranged of a hexagonally packed group of emitters on a circle in a "bolt-hole" beam pattern as shown in Figure 1, and the far field beam profile calculation is based on scalar diffraction theory. The far field complex amplitude distribution is sensitive to near field beam relative phase relationship; array areal fill factor and array number [3]- [5]. We assume that every beam in the array has same intensity distribution with different beam center positions, and every beam waist width is equal as 0 ω , the distance between nearest beams is d, the total number of the laser array is N， ( )…”

Section: Theory Modelmentioning

confidence: 99%

Evaluation of the Coherent Combining Lasers Array by the Power in the Bucket of the Main Lobe Method

Liu¹,

Zhang²,

Zhang³

et al. 2016

OPJ

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Coherent combination of laser beam is an important and challenging area of high power laser science. And how to evaluate the high power laser by coherent beam combination is a new research spot. Formulas for the radiated intensity distributions of coherent combined Gaussian beam array are derived via Fraunhofer scalar diffraction model by utilizing representations of the cross-spectral density of the far field. Effects of beam array numbers and separate distances etc. on far field radiated profiles are shown and analyzed. A new conception named power in the bucket of the main lobe (m PIB) is advanced to measure the beam quality of combined beams. This evaluation method is useful for efficiently determining the peak irradiance and power in the bucket for single emitting apertures of general shape.

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Section: Theory Modelmentioning

confidence: 99%

Evaluation of the Coherent Combining Lasers Array by the Power in the Bucket of the Main Lobe Method

Liu¹,

Zhang²,

Zhang³

et al. 2016

OPJ

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show abstract

“…Coherent combination involves many methods such as master oscillator power amplifier configuration, injection phaselock system, evanescent wave coupling method and etc [2][3][4] . In this paper, we found a novel self-coherent-combination phenomenon in corner cube resonator solid state laser.…”

Section: Self-coherent-combining Of Ccr Lasermentioning

confidence: 99%

Spatial coherence measurement of multiple coherent laser combination

Liu¹,

Cheng²,

Wang³

et al. 2007

SPIE Proceedings

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Coherent combination of laser beam is an important and challenging area of laser science, and many researchers have demonstrated a lot of multiple laser-beam combining technologies and structures. In this paper, the coherent combining principle was discussed and a novel self-coherent-combining solid state laser based on corner cube cavity is reported, for which a corner cube was utilized as a terminal mirror. The authors found that the near-field intensity distribution profile of CCR laser was divided into six fan-shaped segments by dihedral angle lines and their images, while its far-field intensity distribution presenting good centralized profile as a strong peak surrounded symmetrically by six weaker peaks. In order to get quantitative coherence details of CCR lasers, spatial coherence of two conjugate laser beams were measured. The far-field distribution of the conjugate laser beams presented very clear interference pattern and the stripe contrast visibility was calculated as high as 0.74 indicating the coherence degree should be even more than 0.74.

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Phase locking of laser array

Cited by 2 publications

References 0 publications

Evaluation of the Coherent Combining Lasers Array by the Power in the Bucket of the Main Lobe Method

Evaluation of the Coherent Combining Lasers Array by the Power in the Bucket of the Main Lobe Method

Spatial coherence measurement of multiple coherent laser combination

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