Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coherent Power Scaling in Photonic Crystal Surface Emitting Laser Arrays   A key benefit of photonic crystal surface emitting lasers (PCSELs) is the
abillity to increase output power through scaling the emission area while
mainting high quality single mode emission, allowing them to close the
brightness gap which exists between semiconductor lasers and gas and fibre
lasers. However, there are practical limits to the size, and hence power, of an
individual PCSEL device and there are trade-offs between single-mode stability
and parasitic in-plane losses with increasing device size. In this paper we
discuss 2D coherent arrays as an approach to area and coherent power scaling of
PCSELs. We demonstrate in two and three element PCSEL arrays an increase in the
differential efficiency of the system due to a reduction in in-plane loss.

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The categories of this paper are: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
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The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
2
The categories of this paper are: math