A new branch of Spectroscopy has been developed, Phase Laser Spectroscopy, which is able to monitor surface conductivity (real and imaginary parts) at optical frequencies.

Optical noise theory has been developed and applied to the ultrafast laser pulses formation analysis. Theory has explained all "paradoxes" of the picosecond lasers and predicted new regimes of operation.

Multi-component laser plasma plume has been analyzed for specific conditions of the superconducting films deposition process.

It has been shown experimentally and explained theoretically that high power laser beam parameters product is not invariant in the linear transformations.

Theory of the "absorbing" interferometer that does not introduce losses into the laser cavity has been developed and applied to the single-frequency laser mini-systems.

Non-stationary index of refraction (on the "hot" electrons) in Si (at 1 &mu m) has been measured by the transient picosecond holography method.

Self-starting, mode-locked Nd:glass laser with high repetition rate (500GHz) has been developed and demonstrated (without any modulator in the cavity).

A method of "black" pulses generation (named "Anti-mode-locking with optical lever") has been proposed and shown experimentally with use of the interferometer with the slowly moving mirror.

Multi-laser film deposition technology has been developed. A correlation between superconducting film properties and laser beam intensity distribution has been found. Y-Ba-Cu-O superconducting thin films with outstanding parameters were deposited routinely.

It has been found that the thermal lenses in the gain media of the high power solid-state lasers have polarization, radial, and angular dependent aberrations that results in a complex amplitude-phase distribution of the mode field. Effective beam parameters product of 330W-laser has been decreased 1.5 times what made possible to build 1.2-kW output CW Nd:YAG four-laser system with single power delivery fiber.

For the first time single- and double-frequency, diode pumped mini-lasers (1" × 0.5" × 0.5") have been built with Nd:YAG, Nd:YVO₄ and Nd:YLF gain media with output power up to 0.6W. The pulsed laser with auto-modulation of several seconds duration has been experimentally demonstrated (named "entropy waves generator").

Dr. I. Peshko has a long-standing, widely recognized experience in optical technologies and has a long track record of pursuing applied optics and sensors projects successfully. He developed a multilaser deposition technique for the high temperature super-conducting films for Brookhaven National Lab, USA). Recently, Dr. I. Peshko was leading several projects for industrial, military and health applications, such as developing a visualization system for monitoring the chemical reaction with granulation inside the reactors in weak visibility conditions (Patheon, Inc.); special fiber diffusers for medical applications (heart surgery, together with University of California, Los-Angeles, USA and Intelligent Optical Systems, Torrance, CA, USA for the National Institute of Health); optical gas sensors for the diving equipment (together with Engineering Services, Inc. for the DRDC-Toronto). Recently, Dr. I. Peshko designed and built the fiber blue-green laser for biomedical applications (together with Intelligent Optical Systems, Torrance, CA, USA for the National Institute of Health). Lately, he worked within several projects, developing the low repetition rate compact fs-laser and another devices for the non-linear multimodal scanning microscope (University of Toronto at Mississauga, Biophysics group) and gas sensory networks (with the Department of Mechanical and Industrial Engineering, Robotics and Automation Laboratory, University of Toronto and Engineering Services, Inc., Security and Defense Division, Toronto). He developed the mid-IR lasers for ultrasound material diagnostics technologies, for medical surgery and military applications. One of the most valuable recent works is a grant of the US Air Force Lab for development of a High Power Lasers Simulator. Simultaneously Dr. I. Peshko is participating in the development of reliable portable laser systems for the NASA, US Army and National Institute of Health (US) applications. Last year Dr. I. Peshko prepared and submitted for consideration 6 patents.