---
title: "AOM Rise Time & Bandwidth calculator — AperiOptic"
description: "Modulation rise time set by the acoustic transit across the beam waist. Free online optics calculator, with the formula and code snippets."
url: "https://aperioptic.com/calculators/aom-rise-time-bandwidth"
---

# AOM Rise Time & Bandwidth calculator

Modulation rise time set by the acoustic transit across the beam waist.

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

Formula: `T = D/v · tr = 0.6408·T · f−3dB = 0.7496/T (Gaussian beam, Ø = 1/e²)`

## Inputs

| Input | Parameter | Unit | Default |
| --- | --- | --- | --- |
| Beam Ø in crystal | `d` | µm | 100 |
| Acoustic velocity (m/s) | `v` |  | 4200 |

## Result with the default inputs

- Transit time: 23.8095 ns
- Rise time (10–90 %): 15.2566 ns
- Modulation BW (−3 dB): 31.4816 MHz

Open it with your own values: put each input in the address as a parameter, for example [`/calculators/aom-rise-time-bandwidth?d=100`](https://aperioptic.com/calculators/aom-rise-time-bandwidth?d=100). 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)

---

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