# Strong broadband intensity noise squeezing from infrared to terahertz frequencies in lasers with nonlinear dissipation

## TL;DR

This paper introduces a new method to generate strong intensity noise squeezing in lasers across a wide range of frequencies, from infrared to terahertz.

## Contribution

The paper proposes a protocol using lasers with nonlinear dissipation to achieve broadband intensity noise squeezing in previously unattainable THz wavelengths.

## Key findings

- Lasers with sharp intensity-dependent dissipation can produce >10 dB intensity noise squeezing from IR to THz wavelengths.
- The protocol enables gigahertz bandwidth output squeezing and supports self-pulsing and bistability for noise and mean field control.

## Abstract

The generation and application of squeezed light have long been central goals of quantum optics. Intensity noise squeezing of bright (coherent) states (“bright squeezing”), in contrast to squeezed vacuum, is relatively underdeveloped. The current state of the art has generally been restricted to narrow operating wavelength ranges and does not natively support strong intracavity and broadband output squeezing. Here, we show how lasers with sharp intensity-dependent dissipation can support strong intensity noise squeezing from infrared (IR) to terahertz (THz) wavelengths, the latter of which has eluded quantum light generation. Our protocol realizes strongly (
>10
dB) intensity noise-squeezed intracavity quantum states as well as output squeezing surpassing gigahertz bandwidths. Furthermore, we show how the same systems also support self-pulsing and bistability, enabling control of light in both the mean field and noise domains. Our protocol could enable advances in low-noise communication, cavity QED, and quantum sensing across the electromagnetic spectrum.