The smart Trick of KGW Crystal That Nobody is Discussing
The smart Trick of KGW Crystal That Nobody is Discussing
Blog Article
]. Due to limited storage time, Ti:sapphire is typically pumped by frequency-doubled Nd:YAG or Nd:glass strong-point out lasers, which results in a bulky and complicated method with significant Value. As opposed with standard CPA laser methods, the OPCPA procedure can attain a shorter pulse length and a better peak ability.
Employing our promotion bundle, you can Screen your brand, further more beneath your solution description, and these will been viewed by numerous photonics specialists.
We applied a transmission grating (TG) as a dispersive element in our stretcher and compressor. A compact configuration was adopted, in which the stretcher as well as the compressor shared 1 grating comparable to that in Ref.
The purple-shifted part of the SC is of functional value, specifically for what concerns the effectiveness of broadly tunable optical parametric amplifiers pumped by the elemental harmonics of Yb lasers. The dearth of seed photons inside the very long-wavelength region of the SC spectrum limitations the amplification efficiency and ends in pulse-to-pulse Strength fluctuations round the degeneracy region on the optical parametric amplifier. This aspect is quantified in Fig. 6a by plotting the SC spectra regarding spectral Strength density, which was believed by measuring the Electrical power from the axial Component of SC radiation (which happens to be the sole basically valuable Section of SC emission). KGW crystal generates the very best spectral Power density inside the 1200�?450 nm variety, as mentioned within a latest study30.
], but it will add a lot more Price to this element. The intra-cavity spectral achieve curve may be modulated by inserting an etalon that lowers the particular obtain on the wavelength with the maximum acquire aspect[
Amplified pulses having an Power previously mentioned two.5 mJ is often envisioned by applying a greater pump power to the regenerative amplifier and rendering it work for the saturation level. The laser fluence of ~1 J/cm2 within the dichroic mirrors is considered to be underneath the destruction threshold of high-high quality dielectric-coated mirrors.
Another was put with its Np -axis parallel Along with the s-polarized course. A comparison was produced in between a configuration Together with the crystals placed in the identical orientation (
Comparison of spectral Power densities of supercontinua produced while in the problems of exceptional pumping from the investigated resources.
Even though BGO and LT made the narrowest SC spectra (somewhat below one.five optical octaves), they may be considered as very eye-catching nonlinear materials for broadband SC technology with pumping at more time laser wavelengths. Owing to its big nonlinearity, BGO exhibited the bottom SC era threshold (78 nJ) Amongst the investigated supplies, and that is twenty five % reduce than in KGW and could be regarded as exceptional nonlinear substance for pretty minimal-threshold SC era. The observed steady and durable hurt-totally free effectiveness of BGO and GGG at two hundred kHz pulse repetition amount indicates that these nonlinear elements have a possible for SC era at even increased, MHz, repetition costs. Also, these supplies provide SC radiation with an excellent set of parameters that are essential for apps in significant pace spectroscopy and imaging that employ bulk-generated SC, see e.g.seventeen,eighteen,19,twenty.
We designed a diode-pumped Yb:KGW regenerative amplifier since the front stop in the kilohertz terawatt laser technique. Wide bandwidth pulses have been acquired by applying twin crystals with diverse orientations of their optical axes[
While BGO, GGG, YSO, LSO and LYSO from time to time function laser hosts37, They can be mainly discovered as effective scintillators, whose scintillation Houses are studied rather well38. Nevertheless, the nonlinear optical Houses of such crystals and so their opportunity to serve as nonlinear elements for SC generation specifically, and any other experiments regarding nonlinear propagation of rigorous femtosecond laser pulses, stay incredibly poorly researched. So far, GGG, LT23,25 and YSO24 had been only sketchily analyzed for SC technology with Ti:sapphire laser pumping, however, to the very best of our expertise, Not one of the investigated elements were examined with Yb-laser pumping, specifically for what fears their overall performance at really substantial (tens to many kHz) pulse here repetition fees.
Considering the fact that its discovery in 19701,2, the point out with the art of supercontinuum (SC) generation in bulk strong-point out resources has arrived at a higher volume of maturity due to remarkable progress of ultrafast laser resources and basic comprehension of the fundamental Actual physical processes3,four. The complexity of Actual physical effects fundamental SC era is unveiled during the framework of femtosecond filamentation, and that is a universal phenomenon arising from nonlinear propagation of femtosecond laser pulses in clear materials5. In more sensible terms, the attainable spectral extent of SC radiation relies on the fabric Attributes, for example linear and nonlinear indexes of refraction and Power bandgap, which together with the laser wavelength define the important electrical power for self-focusing (that has to generally be exceeded for a lightweight filament to kind) and clamping depth of a light filament (that is proportional for the buy of multiphoton absorption), respectively.
Springer Character or its licensor (e.g. a Culture or other associate) holds unique rights to this article less than a publishing settlement Along with the writer(s) or other rightsholder(s); author self-archiving of your recognized manuscript Edition of this informative article is entirely ruled through the terms of these publishing agreement and applicable regulation.
Springer Mother nature remains neutral regarding jurisdictional promises in posted maps and institutional affiliations.