---
title: "AOM Bragg Angle & Deflection calculator — AperiOptic"
description: "Bragg incidence and full deflection angle for an acousto-optic modulator. Free online optics calculator, with the formula and code snippets."
url: "https://aperioptic.com/calculators/aom-bragg-angle-deflection"
---

# AOM Bragg Angle & Deflection calculator

Bragg incidence and full deflection angle for an acousto-optic modulator.

Category: [Active Optics](https://aperioptic.com/calculators)

Formula: `θB = λ·f/(2·v) in air (λ·f/(2·n·v) in the crystal) · Δθ = 2·θB = λ·f/v`

## Inputs

| Input | Parameter | Unit | Default |
| --- | --- | --- | --- |
| Wavelength | `lam` | nm | 532 |
| RF frequency | `f` | MHz | 80 |
| Acoustic velocity (m/s) | `v` |  | 4200 |
| Index n | `n` |  | 2.26 |

## Result with the default inputs

- Bragg angle (air): 5.0667 mrad
- Deflection Δθ (air): 10.1334 mrad
- Bragg angle (crystal): 2.2419 mrad
- θB air (deg): 0.2903 °

Open it with your own values: put each input in the address as a parameter, for example [`/calculators/aom-bragg-angle-deflection?lam=532`](https://aperioptic.com/calculators/aom-bragg-angle-deflection?lam=532). A unit other than the listed one goes in `<parameter>_unit`.

Read more: [Wikipedia: Acousto-optic modulator](https://en.wikipedia.org/wiki/Acousto-optic_modulator)

[All optics calculators](https://aperioptic.com/calculators)

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The interactive page: https://aperioptic.com/calculators/aom-bragg-angle-deflection (AperiOptic runs in the browser; free, no account). Every page of the site as Markdown: https://aperioptic.com/llms.txt