We demonstrate an optical bistability in a laser system with incoherent optical feedback and a nanosuspension as a nonlinear element. The optical transfer function is shown to exhibit a hysteresis loop for the light power in the range of a few milliwatts. It has been found that the optical bistability relies on the incoherent optical feedback and thermal defocusing nonlinear optical response of the nanosuspension.
© 2014 Optical Society of America
Original Manuscript: February 10, 2014
Revised Manuscript: April 7, 2014
Manuscript Accepted: April 7, 2014
Published: April 30, 2014
George Pobegalov, Peter Agruzov, Igor Ilichev, and Alexander Shamray, "Low-power optical bistability and hysteresis in the laser system with absorbing nanosuspension," Opt. Lett. 39, 2819-2822 (2014)