Abstract
All-optical 1×4 broadcast and 1×3 multicast experiments of a 40-Gb/s return-to-zero on-off keying
(RZ-OOK) signal based on a periodically poled lithium niobate (PPLN) waveguide are demonstrated in this
letter. Clear opened eye diagrams and error-free performance are achieved for the broadcast signals at 1541.3,
1543.7, 1548.5, and 1550.9 nm. Multicast technology uses cascaded second-harmonic generation and
difference-frequency generation in a Ti:PPLN waveguide. An error-free operation with a negligible power
penalty is achieved for the three wavelength-division multiplexing multicast signals at 1533, 1537, and 1541
nm.
© 2013 Chinese Optics Letters
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