Title :
Chromatic focal plane displacement in the parabolic chirped waveguide grating router
Author :
Doerr, C.R. ; Shirasaki, M. ; Joyner, C.H.
Author_Institution :
Bell Labs., Lucent Technol., Holmdel, NJ, USA
fDate :
5/1/1997 12:00:00 AM
Abstract :
It is shown that the application of parabolic chirp to the arm lengths of the waveguide grating router is equivalent to placing a lens with chromatic aberration in the free-space region. By adjusting the focal plane for each port, performance equivalent to a nonchirped grating can be achieved in a desired grating order with significant passband suppression in unwanted grating orders.
Keywords :
aberrations; chirp modulation; diffraction gratings; lenses; optical communication equipment; optical focusing; optical modulation; optical waveguide components; optical waveguides; telecommunication network routing; wavelength division multiplexing; arm lengths; chromatic aberration; chromatic focal plane displacement; focal plane; free-space region; grating orders; nonchirped grating; parabolic chirp; parabolic chirped waveguide grating router; passband suppression; waveguide grating router; Arm; Chirp; Couplers; Gratings; Laser stability; Lenses; Optical waveguides; Passband; Planar waveguides; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
