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- Ravitej Uppu, Anjani Kumar Tiwari, Sushil Mujumdar
- Optics letters
- 2012

We measure intensity statistics and identify statistical regimes and crossovers in random lasers based on nonresonant feedback. A single parameter extracted from an α-stable Levy fit is used to… (More)

- Ravitej Uppu, Sushil Mujumdar
- Physical review letters
- 2015

Lévy fluctuations have associated infinities due to diverging moments, a problem that is circumvented by putting restrictions on the magnitude of the fluctuations, realizing a process called the… (More)

- Ravitej Uppu, Sushil Mujumdar
- Optics express
- 2011

We study the frequency behavior of coherent random lasers consisting monodisperse scatterers with single-particle resonances. A three-dimensional photon propagation model is employed to compute the… (More)

- Ravitej Uppu, Sushil Mujumdar
- Optics letters
- 2015

We report our studies on exponentially-tempered Lévy sums that explain coherent random lasers based on nonresonant feedback. We investigate the hierarchy in the sums and identify the contribution of… (More)

- Ravitej Uppu, Sushil Mujumdar
- 2012 International Conference on Fiber Optics and…
- 2012

We study Lévy statistics at the critical excitation of a nanophotonic, random amplifying system. We observe sub-unity exponents for weak scattering systems that are sensitive to pump fluctuations,… (More)

We investigate diffusive propagation of light and consequent random lasing in an amplifying medium comprising resonant spherical scatterers. A Monte-Carlo calculation based on photon propagation via… (More)

- Anjani Kumar Tiwari, Ravitej Uppu, Sushil Mujumdar
- Optics letters
- 2012

We demonstrate coherent random lasing from an aerosol of dye-doped microdroplets in air. The aerosol is in the form of a linear array of polydisperse, arbitrarily shaped, and randomly spaced… (More)

- Ravitej Uppu, Sushil Mujumdar
- Optics letters
- 2010

We report on intensity fluctuations of a coherent random laser based on incoherent feedback via nonresonant multiple scattering. We quantify the spectral line shape fluctuations in terms of… (More)

- Ravitej Uppu, Sushil Mujumdar
- CLEO: 2013
- 2013

We present a novel approach towards understanding intensity statistics in random lasers by modeling emission dynamics in terms of truncated Lévy sums. Calculated statistics in our model are in… (More)

- Anjani Kumar Tiwari, Ravitej Uppu, Sushil Mujumdar
- 2012 International Conference on Fiber Optics and…
- 2012

We experimentally investigate lasing from quasi-one-dimensional random lattices of amplifying resonators. The transfer matrix method is used to simulate the passive system, which suggests the origin… (More)