Ultra high-speed adaptive and all-optical method for data packet rate multiplication compatible with multiple data rates

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 Bi (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 Bi 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 Bi;
• or subjecting an original optical data packet and the periodic ultrashort optical pulse sample sequence at the repetition frequency of Bi 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 Bi,
• (2) Selecting an adaptive rate multiplication factor
• (2.1) calculating a rate multiplication factor RMi for the data packet adaptively based on the rate Bi of the original low-rate data packet and a rate fop 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 RMi is any value greater than 1,
• (2.2) determining a time amount ΔTi 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 ΔTi to be shortened for the period as determined in Equation (2), so as to convert the low-rate optical data packet at the rate Bi into a plurality of ultrahigh-rate optical data packets at the rate fop, 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.