The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
When adhesive free bonded (AFB) periodically-inverted potassium titanyl phosphate (KTiOPO4, KTP) plates were used as a nonlinear medium inside a cavity, coupled optical parametric oscillators (OPOs) were implemented [1]. As a result, two signal waves and two idler waves can be simultaneously generated. In singly resonant OPOs, two idler waves were used to efficiently generate THz waves [2]. When a...
We investigated multiple coupled optical parametric oscillators, exhibiting behaviors of strong coupling. Conversion efficiency and slope efficiency stay the same as those for conventional and two coupled optical parametric oscillators whereas linewidths are significantly reduced.
By mixing three nearly-even-spaced optical frequencies generated by coupled optical parametric oscillators based in KTP stacks and bulk KTP in a nonlinear medium, we demonstrate coherent interference of THz waves.
Polarization-insensitive phase conjugation, achieved based on difference-frequency generation in a second-order nonlinear composite consisting of stacked KTP plates, was exploited to restore blurred images due to phase distortion as a novel scheme.
Based on adhesive-free-bonded periodically-inverted KTP plates, we have generated a phase-conjugated beam that is insensitive to polarization of the input beam. Such a process can be used to correct a blurred image caused by turbulence.
We have implemented a THz source based on intracavity difference frequency generation in stacked GaP plates as an output coupler of an optical parametric oscillator. The total THz output peak power approaches 200 W.
By mixing three optical frequencies generated by an optical parametric oscillator under a novel configuration based in nonlinear crystals, multiple THz frequencies are efficiently generated. They can be used to pursue variety of novel applications.
Periodically bonded walk-off compensated (PB-WOC) KTiOPO4 stacks can have either quasi-noncritical phase-match (QNCPM) or quasi-phase-match (QPM) properties based on the bonding configurations, result in high efficiency and new applications for optical parametric oscillations (OPOs).
Based on adhesive-free-bonded periodically inverted KTiOPO4 plates, we implemented a singly-resonant optical parametric oscillator, which has superior advantages of compensating walk-off and oscillating dual-signal wavelengths based on QPM.
Quasi-non-critical phase-matched optical parametric oscillation has been achieved in periodically bonded KTiOPO4 stack with a 1.064-μm pump laser. A slope efficiency of 65% has been measured for the total output power of signal and idler.
A sensitive technique has been implemented to measure the differences in refractive indices between rare-earth doped YAG and un-doped YAG. Theoretically, a refractive index difference of less than 10−6 can be identified.
By using a chemical vapor deposited diamond wafer as heat spreader between a YAG and a copper heat sink, a 3.6 times higher effective heat transfer coefficient has been measured compared with conventional indium contact.
Slope efficiency as high as 80% has been achieved in Tm:fiber laser end-pumped adhesive free bonded (AFB) YAG/Ho:YAG/YAG laser composite. 18.7-W output power at 2.09 mum has been achieved at pump power of 24.3 W.
Multilayer walk-off corrected nonlinear crystal composites not only can correct the spatial walk-off, but also can compensate the phase-mismatching caused by incident angle deviation. The noncritical phase-matching-like properties can be engineered to all wavelengths.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.