AI Article Synopsis
- Lasers are crucial in optical communication and medical fields due to their brightness and coherence, but high spatial coherence can lead to challenges like speckle noise.
- A continuous-wave degenerate cavity laser (DCL) with low spatial coherence has been developed, which effectively reduces the thermal lensing effect.
- This DCL achieved 2000 transverse modes and a low speckle contrast, making it useful for reducing speckle and resilient to atmospheric turbulence, which could enhance laser imaging technologies.
Article Abstract
Lasers play a significant role in optical communication, medical, and scientific research, owing to their high brightness and high coherence. However, the high spatial coherence will lead to specific challenges, such as speckle noise in imaging and wavefront distortion during propagation through scattering media. Here, a continuous-wave (cw) degenerate cavity laser (DCL) with low spatial coherence is demonstrated with efficient suppression of the thermal lensing effect from the gain crystal. Experimentally, a cw degenerate laser output with about 2000 transverse modes corresponding to a speckle contrast of about 0.0224 is achieved. This laser can be used for speckle reduction and is robust against atmospheric turbulence, which may find applications in the field of laser imaging technology and illumination.
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| http://dx.doi.org/10.1364/OL.531951 | DOI Listing |
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