Optical parametric oscillation (OPO): We utilize OPO to find out our goods�?nonlinear conversion overall performance and phase-matching angle for the given input wavelength and sign/idler wavelengths. We make selected that our things satisfy the requirements for OPO apps.
A2: Of course, prolonged publicity to humidity can degrade the optical effectiveness of BBO crystals. Humidity may result in drinking water absorption on the crystal surface, that may have an effect on its optical Qualities.
Their substantial hurt threshold and excellent thermal security make them well suited for use in substantial-energy laser methods, though their large transparency assortment allows them to operate with a broad selection of laser wavelengths.
Now compare the utmost energy density to that which happens to be specified as the LIDT for the optic. Should the optic was tested at a wavelength in addition to your working wavelength, the damage threshold need to be scaled correctly [3].
Instead of the reference pulse electrical power spectrum comprising an apodization filter, within the spatial domain the filter could be in NA. The angular area apodization filter even so, is just in one-dimension defined via the plane k and .
Large problems threshold: BBO crystals have large damage boundaries that may get up for their superior leading and typical electric power with out degradation or problems.
The cutting angle is dependent upon the preferred section-matching problem for frequency conversion programs. Period matching describes matching the phase speeds of various beams affiliated with nonlinear processes so which they build up constructively above fars away Within the crystal.
g. twenty μm. The team velocity mismatch from the thicker substrate material might not issue, because the nonlinear conversation usually takes location only in The skinny crystal. The substrate only serves to mechanically stabilize the thin nonlinear crystal.
Bodily, when the fundamental spectrum is properly in the reference pulse spectrum, the SHG pulse depth profile is the sq. of the fundamental intensity profile, successfully truncating the length. This scenario is illustrated in Determine twenty.
The Strength density within your beam should be calculated in terms of J/cm2. The graph to the right shows why expressing the LIDT being an Electricity density supplies the top metric for short pulse sources. Within this regime, the LIDT supplied being an Electricity density might be applied to any beam diameter; 1 isn't going to have to compute an altered LIDT to check here regulate for alterations in spot size.
This property sets it in addition to linear optical elements that don’t change the frequency of light passing by them. Such a distinguishing attribute sorts the foundation for just a myriad of programs that BBO can serve.
Having said that, in many circumstances, the main difference in the elemental and second harmonic pulse velocities can result in one particular pulse to substantially lag the other.
Along with their substantial damage threshold, BBO crystals also show superb thermal and chemical security. They will endure a wide range of temperatures and resist degradation from various chemical interactions.
The size of your SHG crystal substantially affects the spectral width with the reference pulse, or alternatively the bandwidth from the SHG filter.