Robert Van Leeuwen, Age 57Orono, MN

8576885, Nov 5, 2013

Feb 9, 2012

13/369581

Robert van Leeuwen - Ewing NJ, US
Yihan Xiong - Pennington NJ, US
Jean F Seurin - Princeton Junction NJ, US
Chuni L Ghosh - West Windsor NJ, US
Bing Xu - Bayside NY, US

Princeton Optronics, Inc. - Mercerville NJ

H01S 3/04

372 34, 372 36, 372 3805, 372 5012, 372 50124, 372 72

Optical pump modules using VCSEL arrays are provided to pump optical gain media for achieving high power laser output in CW, QCW and pulse operation modes for operation. Low divergence and symmetric far-field emission from VCSELs are particularly suitable for compact arrays. VCSEL arrays configured as laser pump modules are operable at high temperatures with practically no degradation over a long period of time. VCSEL pump modules are adaptable for side- or end-pumping configurations to pump high power lasers in CW, QCW and pulse mode. Power output from VCSEL pump modules is scalable. Incorporating microlens arrays with the VCSEL arrays improve brightness of the pump modules. High power and high temperature operation of VCSEL modules make it suitable for making compact high power solid state lasers that are operable in small spaces such as, ignition of internal combustion engines, stationary power generation engines and pulsed detonation engines.

6788715, Sep 7, 2004

May 30, 2003

10/448767

Robert Van Leeuwen - Princeton NJ
Thomas Oh - Newton PA

Princeton Optronics - Mercerville NJ

H01S 3113

372 11, 372 20, 372 31, 372 19, 372 32

An IAU laser is stabilized to reduce intensity fluctuations. The laser comprises an IAU gain medium disposed in an optical resonance cavity and a multiphoton absorbing medium disposed in the cavity to reduce intensity fluctuations. A pump source to excite the gain medium is coupled to the cavity. In operation, the multiphoton absorbing material absorbs primarily at high intensity levels, effectively increasing the loss at high intensities. In an advantageous embodiment, the active medium comprises erbium-doped glass and the multiphoton absorber comprises a body of semiconductor exhibiting two-photon absorption at the emission wavelength.

2016034, Dec 1, 2016

May 27, 2016

15/166296

- Mercerville NJ, US
Qing Wang - Plainsboro NJ, US
Bing Xu - Bayside NY, US
Robert van Leeuwen - Ewing NJ, US

Princeton Optronics Inc. - Mercerville NJ

F02P 23/04

A high efficiency optical ignition device is provided in a two-part compact and robust package to be mounted directly on an internal combustion engine chamber. The ignition device ignites a combustion fuel with a high intensity plasma generated by a high power laser beam from a solid state laser operable in Q-switched, or non-Q-switched mode for producing short or long pulses, respectively. Multiple pulses are generated, and duration and frequency of the laser beam pulses are controlled by controlling an optical pump module to pump the solid state laser. The optical pump module comprises a semiconductor laser, preferably a VCSEL device. One or more laser beams are precisely directed, each one to a desired location anywhere within the combustion chamber for more efficient and near complete burning of the combustion fuel. The robust packaging is well suited to withstand mechanical and thermal stresses of the internal combustion engine.