Abstract
We demonstrate a picosecond optical parametric oscillator (OPO) that is synchronously pumped by a fiber-amplified gain-switched laser diode. At 24W of pump power, up to 7.3W at 1.54microm and 3.1W at 3.4microm is obtained in separate output beams. The periodically poled MgO-doped LiNbO(3) OPO operates with ~17ps pulses at a fundamental repetition rate of 114.8MHz but can be switched to higher repetition rates up to ~1GHz. Tunabilty between 1.4microm and 1.7microm (signal) and 2.9microm and 4.4microm (idler) is demonstrated by translating the nonlinear crystal to access different poling-period gratings and typical M(2) values of 1.1 by 1.2 (signal) and 1.6 by 3.2 (idler) are measured at high power for the singly resonant oscillator.
Highlights
The pump laser consists of a gain-switched laser diode and a chain of laser-diode-pumped Yb-doped fibre amplifiers [6]
The origins of the roll-over effect are not yet understood, but it is assumed to be of thermal nature and we note that if just a few percent of the pump power is converted to heat, the high dne/dT value combined with the heat removal from only one face of the slab-like nonlinear crystal would lead to a strongly aberrated thermal lens
We have demonstrated a high power, user-controllable repetition rate SPOPO pumped by a fibre-amplified gain-switched laser diode
Summary
The pump laser consists of a gain-switched laser diode and a chain of laser-diode-pumped Yb-doped fibre amplifiers [6]. It delivers ∆t = 21ps, M2 = 1.02, λc = 1.06μm, linearly polarized pulses with average powers up to 100W. The repetition rate can be user-controlled between 100MHz and 1GHz. The SPOPO used a periodically poled, 5% MgO-doped, congruent LiNbO3 crystal for the nonlinear gain medium.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
