Experiments and numerical simulations on lasing in random media

Sushil Mujumdar; Renato Torre; Stefano Cavalieri; Diederik S. Wiersma

doi:10.1117/12.561054

2 August 2004 Experiments and numerical simulations on lasing in random media

Sushil Mujumdar, Renato Torre, Stefano Cavalieri, Diederik S. Wiersma

Proceedings Volume 5508, Complex Mediums V: Light and Complexity; (2004) https://doi.org/10.1117/12.561054
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

We report numerical and experimental studies on multiple scattering media with gain. We describe Monte Carlo simulations that model the behavior of such a system through a three dimensional random walk of photons in a disordered medium with amplification. Two experimentally observed phenomena, viz. temperature tunable random lasing and ultra-narrow lasing modes, are analyzed using the model. We compare the results of our model with previous experimental results on a disordered dielectric of which the scattering strength could be tuned by changing the external temperature. The agreement between the numerical and experimental results enables us to predict the spectral features of the emission from the tunable random laser under various conditions. Results obtained from new experimental data are consistent with the predictions of the simulations. The model also explains the observation of ultra-narrow emission modes in random lasers without requiring optical cavities. The introduction of exponential gain in a multiple light scattering process strongly increases the importance of very long light paths. Such long paths are often neglected in passive disordered materials but we show that they can dominate the emission spectrum from an amplifying disordered system.

Citation Download Citation

Sushil Mujumdar, Renato Torre, Stefano Cavalieri, and Diederik S. Wiersma "Experiments and numerical simulations on lasing in random media", Proc. SPIE 5508, Complex Mediums V: Light and Complexity, (2 August 2004); https://doi.org/10.1117/12.561054

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Laser scattering

Numerical simulations

Random lasers

Light scattering

Multiple scattering

Anisotropy

Laser crystals

Show All Keywords

Keywords/Phrases

Search In:

Publication Years