Once the mixture has long been entirely melted, it is actually then permitted to awesome bit by bit. This gradual cooling procedure is critical, mainly because it lets BBO crystals to sort step by step in the liquid mixture. The rate of cooling is diligently regulated to advertise the growth of large, superior-quality crystals.
Although the above mentioned method supplies an excellent general guideline for LIDT values, remember to Speak to Tech Assistance if your wavelength is different from the specified LIDT wavelength. In the event your electric power density is a lot less than the altered LIDT of your optic, then the optic really should get the job done for the software.
Their higher problems threshold and exceptional thermal security make them suitable for use in large-power laser programs, even though their vast transparency array enables them to operate with a broad range of laser wavelengths.
Thorlabs expresses LIDT for CW lasers like a linear electrical power density measured in W/cm. With this routine, the LIDT presented for a linear electricity density can be placed on any beam diameter; a single isn't going to ought to compute an modified LIDT to regulate for adjustments in place dimension, as demonstrated because of the graph to the correct. Common linear energy density is usually calculated using the equation underneath.
BBO is of unique significance while in the noticeable and far UV. Lots of section-matching purposes are possible, such as the pursuing:
These resilience ensures that its nonlinear Qualities are usually not very easily compromised, making it a favourite in environments where regularity and reliability are paramount.
The cutting angle depends upon the popular period-matching issue for frequency conversion programs. Section matching describes matching the stage speeds of varied beams affiliated with nonlinear procedures so that they Develop up constructively in excess of fars away Within the crystal.
The group velocity plus the section velocity are not equivalent, meaning the sine wave with the provider as well as envelope of the heart beat transfer as a result of optical media at various speeds.
The superior harm threshold of BBO crystals is particularly vital in environments in which high-depth lasers are classified as the norm. Regular products might falter, degrade, or maybe break underneath these intensities.
A: The wide transparency vary provides versatility, permitting BBO crystals for use throughout a diverse selection of wavelengths and programs.
Significant nonlinear coefficients: BBO crystals have important nonlinear coefficients which make successful frequency conversion procedures with very low input power demands feasible.
What's more, BBO crystals are recognized for their superior nonlinear coefficient, which enables them to proficiently convert the frequency of sunshine.
For that reason, the next harmonic pulse spectrum, shown on the appropriate, incorporates a spectral width somewhere around the same as the ideal case. Ideally, every frequency in the basic pulse spectrum can be concurrently period matched.
As a result of its superb Attributes BBO crystal includes a quantity of benefits for various apps, like NOPA with fsec pulses, harmonics generation (approximately fifth) of Nd:YAG and Nd:YLF lasers, frequency doubling or tripling of femtosecond Ti:Sapphire and dye lasers, OPO at Variety one and kind 2 stage-matching, E/O switching for Pockels get more info cells and all kinds of other.