Optical parametric oscillation (OPO): We utilize OPO to ascertain our items�?nonlinear conversion general performance and phase-matching angle for any presented input wavelength and signal/idler wavelengths. We make specific that our things meet the necessities for OPO apps.
When choosing an SHG crystal, the heart beat period of your laser source needs to be taken into account. A mismatch in between the duration and crystal thickness will result in SHG pulses for a longer period in time and narrower in spectral articles than feasible under perfect disorders.
These Homes make BBO crystals hugely fascinating in various programs, from laser frequency conversion to electro-optic modulation. Their vast transparency range will allow them to work which has a wide number of laser wavelengths, although their superior destruction threshold makes sure they will handle higher-power laser beams with no degradation.
So as to use the specified CW injury threshold of the optic, it is necessary to learn the next:
BBO crystals might be cleaned utilizing a tender cloth or air blower. For stubborn stains, a delicate detergent or isopropyl Liquor can be utilized. It’s important to stay clear of employing abrasive elements that could scratch the crystal’s area. When cleaning BBO crystals, it’s vital that you use a mild, circular motion to avoid scratching the floor.
). This spatial focusing constraint over the SHG procedure will commonly bring about the crystal size constantly remaining less than the Rayleigh array of the input focused pulse.
This compose-up will explain how we deliver substantial-top quality BBO crystals at our company. We will likely evaluation some pros and challenges of working with BBO crystals for regularity conversion.
Nonlinear Crystals of possibly β-barium borate (BBO) or lithium triborate (LBO) are used for frequency conversion of laser sources. BBO crystals feature thicknesses from 0.2mm to 0.5mm to minimize team velocity mismatch and are perfect for frequency doubling or tripling of Ti:Sapphire and Yb:doped laser pulses. The significant and noncritical section matching LBO crystals are ideal for second or 3rd harmonic generation of Nd:YAG and Yb:doped lasers.
Large-precision laser microfabrication is a method where by components are processed and modified over a microscopic scale. This method requires a laser source that could generate particularly concentrated and precise beams of light. The 266nm wavelength is particularly well suited for this as a consequence of its shorter wavelength, which makes certain that the laser beam may be centered to an incredibly compact place sizing.
The subsequent is a normal overview of how laser induced destruction thresholds are measured And the way the values may very well be used in pinpointing the appropriateness of the optic for just a presented software. When choosing optics, it can be crucial to be familiar with the Laser Induced Destruction Threshold (LIDT) of the optics getting used. The LIDT for an optic enormously will depend on the type of laser you're applying. Constant wave (CW) lasers typically cause damage from thermal consequences (absorption possibly during the coating or within the substrate).
This property sets it in addition to linear optical products that don’t alter the frequency of sunshine passing by way of them. Such a distinguishing aspect types the inspiration for the myriad of applications that BBO can provide.
Numerous properties of a nonlinear crystal is often important for an application e.g. in nonlinear frequency conversion:
Comprehending Crystal is akin to appreciating the bedrock of advanced optical technological know-how. At its essence, BBO, or Beta Barium read more Borate, stands for a nonlinear optical crystal. The time period “nonlinear�?listed here signifies the exclusive means of the crystal to interact with gentle inside of a method that alters The sunshine’s frequency.
Because the refractive index doesn't fluctuate linearly with frequency in dispersive crystals like β-BBO, it is actually not possible to optimally stage match each and every frequency while in the input pulse's spectral array Using the corresponding 2nd harmonic frequency during the generated pulse.