Title :
Compact linearized optical FM discriminator
Author :
Xie, Xiaobo ; Khurgin, Jacob B. ; Kang, Jin U. ; Choa, Fow-Sen
Author_Institution :
Johns Hopkins Univ., Baltimore, MD, USA
fDate :
3/1/2002 12:00:00 AM
Abstract :
A new type of optical frequency discriminator is proposed and analyzed numerically. The discriminator is based on a linear variation of the reflectivity of an optical reflection grating versus frequency. The proposed chirped grating has a constant /spl kappa/ or index variation and the reflectivity versus optical frequency is tailored by employing a grating with a spatially varying chirp parameter. Integration with a frequency-modulated distributed feedback laser would yield an efficient photonic RF transmitter.
Keywords :
chirp modulation; diffraction gratings; distributed feedback lasers; integrated optoelectronics; microwave photonics; optical modulation; optical transmitters; reflectivity; RF signal modulation; chirped grating; compact linearized optical FM discriminator; efficient photonic RF transmitter; frequency-modulated distributed feedback laser; index variation; linear reflectivity variation; microwave photonics; optical carrier; optical frequency discriminator; optical reflection grating; spatially varying chirp parameter; Chirp; Frequency modulation; Gratings; Optical feedback; Optical filters; Optical interferometry; Optical modulation; Optical reflection; Optical transmitters; Reflectivity;
Journal_Title :
Photonics Technology Letters, IEEE
