| CPC H01S 5/423 (2013.01) [H01S 5/04254 (2019.08); H01S 5/04256 (2019.08); H01S 5/18308 (2013.01); H01S 5/18313 (2013.01); H01S 5/1833 (2013.01); H01S 5/2063 (2013.01); H01S 2301/176 (2013.01)] | 20 Claims |

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1. An emitter array, comprising:
a first emitter comprising a first plurality of radial extensions and a first plurality of trenches,
wherein a first trench, of the first plurality of trenches, is arranged between a first pair of radial extensions, of the first plurality of radial extensions, and
wherein the first plurality of radial extensions define a first total of radial extensions; and
a second emitter, adjacent to the first emitter, comprising a second plurality of radial extensions and a second plurality of trenches,
wherein a second trench, of the second plurality of trenches, is arranged between a second pair of radial extensions, of the second plurality of radial extensions, and
wherein the second plurality of radial extensions defines a second total of radial extensions that is different than the first total of radial extensions.
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