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A supercontinuum source is created when a number of nonlinear processes interact with a pump beam to drastically extend its spectral range, for instance using a microstructured optical fibre.
The outcome is a continuous spectrum that is smooth. There is disagreement over the threshold for what qualifies as a supercontinuum; nonetheless, researchers have published work indicating that as little as 60 nm of broadening qualifies.
Additionally, publications use anywhere from 5 dB to 40 dB or more when defining the spectral flatness necessary to determine the source’s bandwidth.
The Global Supercontinuum Sources Market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
The spectral range of the supercontinuum has expanded by an order of magnitude, extending from 380 to 2400 nm. Continued product and application evolution will be made possible by a better knowledge of supercontinuum generation in optical fibres.
The name “supercontinuum” finally arose from the creation of an extended “white light” source using extremely nonlinear spectrum widening of optical pulses.
The interaction length is inversely proportional to spot size: the tighter the focus, the shorter the effective interaction length; nevertheless, because the nonlinearity of glass is very low, it requires very high peak energies to induce appreciable spectrum widening in bulk material (typically a few centimetres).
Constricting light and extending the interaction length with optical fibres is the apparent option. However, using optical fibre only partially resolves the issue since spectral broadening brought on by the nonlinear characteristics of standard fibres (SMF-28 type) results in spectral enrichment primarily at longer wavelengths and, with the pump around 1064 nm, the visible region of the spectrum remains largely unpopulated.
Both the advancement of technology and the changing demands of the industry have fueled the development of supercontinuum lasers.
From a scientific perspective, supercontinuum laser producers have been compelled to comprehend the boundaries and constraints of the technology, whereas the market has demanded that we tailor performance for particular applications in a way that enables us to win business and make supercontinuum lasers appropriate for commonplace industrial applications.
