Title :
Low-power spectral phase correlator using periodically poled LiNbO3 waveguides
Author :
Zheng, Z. ; Weiner, A.M. ; Parameswaran, K.R. ; Chou, M.H. ; Fejer, M.M.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
fDate :
4/1/2001 12:00:00 AM
Abstract :
We report a novel optical spectral phase correlation scheme for coded ultrashort pulses based on the use of long periodically poled lithium niobate second harmonic generation waveguides. Second harmonic efficiency as high as 50%/pJ was obtained, which allowed us to demonstrate nonlinear detection of individual pulses at 0.25 pJ input energies over a 500-MHz detection bandwidth with >50:1 signal-to-noise ratio. These results offer the possibility of sub-pJ real-time operation of such devices as nonlinear receivers in ultrashort-pulse optical code-division multiple-access (CDMA) networks.
Keywords :
code division multiple access; dielectric polarisation; high-speed optical techniques; lithium compounds; optical correlation; optical harmonic generation; optical receivers; optical waveguides; 0.25 pJ; CDMA networks; LiNbO/sub 3/; LiNbO/sub 3/ long periodically poled SHG waveguides; LiNbO/sub 3/ waveguides; MHz detection bandwidth; coded ultrashort pulses; input energies; low-power spectral phase correlator; nonlinear detection; nonlinear optical receivers; optical spectral phase correlation scheme; periodically poled; second harmonic efficiency; signal-to-noise ratio; sub-pJ real-time operation; ultrashort-pulse optical code-division multiple-access networks; Bandwidth; Correlators; Lithium niobate; Multiaccess communication; Nonlinear optics; Optical harmonic generation; Optical pulse generation; Optical pulses; Optical receivers; Optical waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
