---
title: "The Random Laser"
url: https://daily.dev/posts/the-random-laser-qhr29kd5a
source_url: https://hackaday.com/2026/01/15/the-random-laser/
type: article
source: "Hackaday"
published: 2026-01-15T18:07:50.981Z
updated: 2026-01-15T18:08:10.168Z
tags: ["physics"]
reading_time: 4
upvotes: 0
comments: 0
language: en
---

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# The Random Laser

**[Hackaday](https://daily.dev/sources/hackaday)** · 4 min read · 0 upvotes · 0 comments

## Summary

Random lasers generate coherent light through photon scattering in a gain medium rather than using mirrors like conventional lasers. The scattering medium (rough crystals or nanoparticles) causes photons to bounce randomly, and when gain exceeds losses along certain paths, laser emission occurs. While outputs are locally coherent, they may not be globally coherent across different emission points or time scales. These devices are simple to construct, tolerant of defects, but difficult to predict. Applications include speckle-free illumination, identification markers, and biological tagging using tissue as the scattering medium.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://hackaday.com/2026/01/15/the-random-laser/>

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---

Tags: [#physics](https://daily.dev/tags/physics)

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