The Single Best Strategy To Use For a-BBO Crystal
The Single Best Strategy To Use For a-BBO Crystal
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The crystal axis is c. The Main ray is parallel into the way used to measure the tuning angle (θ), that's optimized throughout phase matching. Conversion performance is optimized for rays parallel on the chief ray and worse for rays at larger angles (ψ) to your Main ray.
Regretably, it could be very difficult to compare the LIDT specification of an optic for your laser. You can find a number of regimes wherein a pulsed laser can harm an optic and this relies to the laser's pulse size. The highlighted columns during the desk underneath define the related pulse lengths for our specified LIDT values.
Hi there, thank you for getting in contact with Thorlabs. The wavelength ranges in the antireflective coatings on these β-BBO crystals align Together with the respective wavelength bands that these crystals are optimized for. Requests for customizations is usually created by reaching out to us at techsupport@thorlabs.com
On the other hand, to completely use the prospective of BBO crystals, it can be critical to be familiar with their Homes and how to take care of and retailer them thoroughly. These crystals have to have cautious dealing with to prevent harm to their surfaces and will be saved in a dry, awesome put to maintain their optical overall performance.
From the ray-design standpoint, the propagation way defines the orientation with the central (Main) ray in Figure 23. The SHG method is affected by the number of angles over which incident light-weight propagates, because mild that is not parallel to your Main ray has reduced phase-matching relative towards the Main ray.
The performance with the SHG approach decreases substantially as the elemental beam diverges from its emphasis, since the pulse Electrical power is distributed across a bigger beam cross portion.
In some instances, the mismatch could be little. Such as, each time a β-BBO crystal is used to frequency double 1550 nm light-weight and supply 775 nm gentle, the group velocity mismatch is only a few femtoseconds per millimeter.
This kind of functionality is a must have in situations exactly where a specific mild frequency is required, although the source doesn’t Obviously provide it. By utilizing BBO’s Qualities, researchers and engineers can properly “tune�?their light-weight resources to desired frequencies.
BBO crystals need click here to be taken care of with treatment in order to avoid scratching or damaging their surfaces. They ought to be saved within a dry, awesome put and saved faraway from immediate sunlight. Standard cleaning having a delicate cloth or air blower is usually recommended to take care of their optical functionality. When handling BBO crystals, it’s crucial to use gloves to stop oils in the skin from contaminating the crystal floor.
The period velocity is the speed at which the sphere copyright, i.e. the sine wave, travels in a material. The rate at which a pulse envelope travels in a material is called the group velocity and defines the pace with the energy packet comprising the optical pulse traveling via the material.
The basic resource is the dye laser radiation pumped by the next harmonic of a Q-switched Nd: YAG laser. A stroll-off compensated configuration with the BBO crystal pair has enabled us to realize this type of substantial conversion performance during the interaction.
When choosing an SHG crystal, the heartbeat period of the laser source have to be taken into consideration. A mismatch concerning the length and crystal thickness will produce SHG pulses lengthier in time and narrower in spectral articles than achievable underneath suitable conditions.
The 2nd harmonic gentle is then polarized parallel on the airplane. Angle tuning adjusts θ which is done by rotating the crystal throughout the Y-axis.
This is particularly vital in industries like semiconductors and micro-electromechanical systems (MEMS), the place even a minimal mistake can render a element ineffective or bring on significant losses. With BBO’s 266nm era, industries can realize greater accuracy and dependability inside their fabrication procedures, driving innovation and product top quality to new heights.