Laser Diode Spectral Shaping

In the area of spectral shaping, our research is focussed on the use of the optical schemes for stable single and dual-wavelength operations of laser diodes using volume Bragg gratings and fibre Bragg gratings. The dual-wavelength operation is particularly desirable for terahertz difference signal generation and for super-resolution microscopy.

Our group has demonstrated several laser sources generating two optical modes in the IR and visible spectral region with a tuneable difference frequency between 0.3THz and 33 THz using either volume Bragg gratings (VBGs) or diffraction gratings.