This articles discusses light (electromagnetic radiation) sythensis using a specifically designed emitter. 

Ultrafast light field synthesis is performed through the spectral division of a coherent supercontinuum into three different bands (channels) by chirped dichroic beamsplitters. Using an interferometric spatio-temporal superposition a field waveform can be controlled and synthesized. All constituent pulses from the channels of CAPELLA are temporally compressed by chirped mirrors down to pulse duration of <10 fs. Introducing different time-delays among the channels enables the shaping and sub-cycle control of the field waveform.

 Left: Spectral splitting of the different channels.    Center: Parallel channel compression and temporal       overlap with attosecond resolution.   Right: Passive interferometric stability between different       channels over more than an hour.

CAPELLA

We present the first commercial Light Field Synthesizer enabling synthesis and sub-femtosecond control of  super-octave light transients. Due to its solidness, compactness and excellent thermal capabilities, CAPELLA can maintain the optical pathlength stable among the different channels for many hours. Furthermore, an extra active-controlled loop improves the interferometric stability to <50 mrad. Apart from the generation of waveforms, CAPELLA offers the shortest 

pulses available in market to date, see below:

Key Product Features  Shortest pulse available 2 fs FWHM  Overall transmission >60% @ 9 mm beam >70% @ 7 mm beam  Parallel pulse compression of multiple channels:      <9 fs (700-1000 nm) <8 fs (500-700 nm) <10 fs (400-500 nm)  Attosecond-scale delay among the channels  Interferometric stability Short term passive stability:      <100 mrad Long term active-loop stability:      <50 mrad  Incident polarization: s or p polarization  Laptop and user-friendly software interface included  Small Footprint: 30 x 20 cm2