Spatial coherence of broad-area laser diodes

Partanen, Henri; Tervo, Jani; Turunen, Jari

doi:10.1364/ao.52.003221

Cited by 14 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our case the transverse and longitudinal modes overlap spectrally, which makes their identification difficult [11]. In addition, the true modes depart significantly from the ideal ones (most likely because of the asymmetry of the resonator), and the method does not allow phase measurements.…”

mentioning

confidence: 89%

See 1 more Smart Citation

Coherence measurement with digital micromirror device

2014

Self Cite

View full text Add to dashboard Cite

We measure the complex-valued spatial coherence function of a multimode broad-area laser diode using Young's classical double slit experiment realized with a digital micromirror device. We use this data to construct the coherent modes of the beam and to simulate its propagation before and after the measurement plane. When comparing the results to directly measured intensity profiles, we find excellent correspondence to the extent that even small details of the beam can be predicted. We also consider the number of measurement points required to model the beam with sufficient accuracy.

show abstract

mentioning

confidence: 89%

“…In addition, the true modes depart significantly from the ideal ones (most likely because of the asymmetry of the resonator), and the method does not allow phase measurements. However, the main propagation characteristics could be modeled using a so-called elementary field method [11].…”

mentioning

confidence: 99%

Coherence measurement with digital micromirror device

2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…A valuable theoretical model based on the shifted elementary field method [8][9] was proposed by Partanen et al [10]. In our work we make a similar assumption, i.e.…”

mentioning

confidence: 88%

The concentration of energy from Edge Lasers by Diffractive Optical Component

Sobczyk

Suszek

Kołodziejczyk

et al. 2016

Photon. Lett. Poland

View full text Add to dashboard Cite

show abstract

“…In this approach, the 4D integrations are replaced by sets of N 2D integrations, where N is small for fields with a high degree of spatial coherence [8,9]. However, many laser sources including excimers [16] and multimode semiconductor lasers [17] support a large number of uncorrelated modes. In this case the elementary-field approach [15], which we will consider below, can be expected to show superior numerical performance.…”

Section: Preliminariesmentioning

confidence: 99%

“…(16) for the CSD and Eq. (17) for the spectral density. Clearly, this approach is preferable especially when N given by Eq.…”

Section: Application To Field Homogenizationmentioning

confidence: 99%

Elementary-field analysis of partially coherent beam shaping

2013

Self Cite

View full text Add to dashboard Cite

We consider spatial shaping of partially coherent fields in two types of optical systems: a 2F Fourier-transforming system with the beam shaping element in the input plane and a 4F imaging system with the element in the intermediate Fourier plane. Different representations of the spatially partially coherent field in terms of fully coherent fields are examined to permit reduction of the dimensionality of the propagation integrals. The standard Mercer-type coherent-mode representation of the incident cross-spectral density (CSD) function is compared to expansions of CSD in either spatially or angularly shifted elementary field modes, all sharing the same spatial profile. In Fourier-transforming systems, the angular elementary-field representation proves computationally superior, while in imaging systems the spatially shifted elementary-field expansion is the best choice. Considering the Fourier-plane element as a generalized pupil, the latter leads to the concept's generalized amplitude associated with the elementary field and to a generalized transfer function of the system. These concepts reduce to the standard point spread function and the optical transfer function in the limit of spatial incoherence at the object plane. Examples of the effects of partial coherence in spatial beam shaping are given.

show abstract

Spatial coherence of broad-area laser diodes

Cited by 14 publications

References 21 publications

Coherence measurement with digital micromirror device

Coherence measurement with digital micromirror device

The concentration of energy from Edge Lasers by Diffractive Optical Component

Elementary-field analysis of partially coherent beam shaping

Contact Info

Product

Resources

About