OPTICAL PRODUCT
Supercontinuum LASERS
SUPERCONTINUUM LASERS— PRINCIPLES, PERFORMANCE, AND KEY SUPPLIERS
///////////////////////////////////////////////////////////////////////////////////////////////////
Thomas FERHAT, Deepak NAIR NKT Photonics, Bregnerødvej 144, 3460 Birkerød, Denmark * sales-eu @ nktphotonics. com
https:// doi. org / 10.1051 / photon / 202613772
Since the first demonstration in optical fibers, supercontinuum sources have evolved quickly, driven by advances in ultrafast fiber lasers and nonlinear fiber design. Today, supercontinuum sources are available as robust, turnkey systems suitable for both laboratory and industrial environments. This buyer’ s guide provides an overview of the physical principles behind supercontinuum generation, highlights the key performance parameters, and presents the main suppliers in this rapidly evolving market.
Broadband light sources play a central role in modern photonics, supporting applications that range from spectroscopy and imaging to metrology and industrial inspection. Traditionally, users have had to choose between incoherent sources, such as lamps offering wide spectral coverage but low brightness, and lasers providing high spatial coherence but limited spectral bandwidth. Supercontinuum
Figure 1. Typical spectral power density of a commercial 78 MHz supercontinuum light source pumped at 1064 nm.( SuperK FIU-15 – NKT Photonics). lasers bridge this gap by combining both properties in a single source, delivering diffraction-limited beams over extremely broad spectral ranges.
PRINCIPLES OF SUPERCONTINUUM GENERATION Supercontinuum( SC) lasers are versatile light sources, delivering bright, broad-spectrum light from the visible to the infrared. Often referred to as“ white lasers,” they combine the high spatial coherence of lasers with the wide spectral coverage of thermal sources. This unique combination has driven their rapid adoption in fields ranging from spectroscopy to biomedical imaging and industrial inspection. Supercontinuum generation is a nonlinear optical process in which a narrowband input pulse is transformed into a broad and continuous
72 www. photoniques. com I Photoniques 137