Patent ID: 8078058

Claim:
An ultrahigh-speed adaptive and all-optical method for data packet rate multiplication compatible with multiple data rates, comprising steps of: (1) Pulse width compression on low-rate data packet; (1.1) generating an ultrashort optical pulse sample sequence: using an ultrashort-pulse laser source that can be synchronized with an external data clock to generate a periodic ultrashort optical pulse sample sequence at a repetition frequency of B i (iε{1, 2, . . . , n}), (1.2) subjecting an original low-rate electronic data packet and the periodic ultrashort optical pulse sample sequence at the repetition frequency of B i to ultrafast electrooptical sampling and then generating an original low-rate optical data packet which is based on ultrashort pulses and at a rate of B i ; or subjecting an original optical data packet and the periodic ultrashort optical pulse sample sequence at the repetition frequency of B i to all-optical sampling and then generating an original low-rate optical data packet which is based on ultrashort pulses and at a rate of B i , (2) Selecting an adaptive rate multiplication factor (2.1) calculating a rate multiplication factor RM i for the data packet adaptively based on the rate B i of the original low-rate data packet and a rate f op of an ultrahigh-rate optical data packet to be reached after the multiplication, RM i = f op B i ( 1 ) where iε{1, 2, . . . , n}, and RM i is any value greater than 1, (2.2) determining a time amount ΔT i to be shortened in the compression process, Δ ⁢ ⁢ T i = ⁢ 1 B i - 1 f op = ⁢ ( RM i - 1 ) ⁢ τ ( 2 ) where τ = 1 f op is the period of a compressed optical data packet, (3) Compressing the period of the original low-rate optical data packet: compressing the period of the original low-rate optical data packet by an optical data packet rate multiplication unit according to the time amount ΔT i to be shortened for the period as determined in Equation (2), so as to convert the low-rate optical data packet at the rate B i into a plurality of ultrahigh-rate optical data packets at the rate f op , wherein only one of the plurality of ultrahigh-rate optical data packets maintains an original correct frame structure, and the rest are of erroneous frame structure, (4) Acquiring the ultrahigh-rate optical data packet of the correct frame structure: screening out the ultrahigh-rate optical data packet of the correct frame structure at an output of the optical data packet rate multiplication unit with an optical gating signal.