Advantages of out-of-plane pulse compression gratings

Dale L. Smith; Samuel L. Erdogan; Turan Erdogan

doi:10.1364/AO.485637

Applied Optics
Vol. 62,
Issue 13,
pp. 3357-3369
(2023)
•https://doi.org/10.1364/AO.485637

Advantages of out-of-plane pulse compression gratings

Dale L. Smith, Samuel L. Erdogan, and Turan Erdogan

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Dale L. Smith, Samuel L. Erdogan, and Turan Erdogan, "Advantages of out-of-plane pulse compression gratings," Appl. Opt. 62, 3357-3369 (2023)

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Related Topics
Table of Contents Category
- Diffraction and Gratings
Optics & Photonics Topics
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The topics in this list come from the Optics and Photonics Topics applied to this article.

About this Article
History
- Original Manuscript: January 13, 2023
- Revised Manuscript: March 26, 2023
- Manuscript Accepted: March 27, 2023
- Published: April 24, 2023

Abstract

Diffraction gratings for pulse compression generally perform best at the Littrow angle, but reflection gratings require a nonzero deviation angle to separate the incident and diffracted beams, so they cannot be used at the Littrow angle. In this paper, we show both theoretically and experimentally that most practical multilayer dielectric (MLD) and gold reflection grating designs can be used with quite substantial beam-deviation angles—as large as even 30°—by mounting the grating out-of-plane and choosing the optimal polarization. The impact of polarization when mounting out-of-plane is explained and quantified.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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	Gold			MLD
Low dispersion		$δ = 10^{\circ}$	$δ = 30^{\circ}$		$δ = 10^{\circ}$	$δ = 30^{\circ}$
(1480/800)	Optimal	$+ +$	$+ +$	Optimal	$+ +$	$+$
	Lab	$+ +$	$+ +$	Lab	$+ +$	$+$
	In-plane	$+ +$	$+$	Pitch	$+ +$	$+$
	Pitch	$+$	±	Roll	$+$	±
	Roll	$+$	–	In-plane	–	− −
	Key advantage: Broader bandwidth at shorter wavelengths			Key advantage: Necessary, as in-plane is not satisfactory even for small $δ$
High dispersion		$δ = 10^{\circ}$	$δ = 30^{\circ}$		$δ = 10^{\circ}$	$δ = 30^{\circ}$
(1760/1030)	Optimal	$+ +$	$+$	Optimal	$+ +$	$+$
	Lab	$+ +$	$+$	Lab	$+ +$	$+$
	Roll	$+ +$	±	Roll	$+$	±
	In-plane	±	− −	In-plane	$+$	− −
	Pitch	±	− −	Pitch	±	− −
	Key advantage: Better efficiency for small $δ$ ; enables large $δ$ when required			Key advantage: Better efficiency for small $δ$ ; enables large $δ$ when required

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Applied Optics