摘要:
Disclosed is a wide-band fiber amplifier for amplifying C-band and L-band optical signals, including a first amplifying unit including a first amplifying fiber adapted to be (1) pumped in at least one direction (2) amplify both the C-band and L-band optical signals and (3) output Amplified Spontaneous Emission (ASE), a second amplifying unit including a second amplifying fiber adapted to be pumped by amplified ASE and secondarily amplify the amplified L-band optical signal, and an L-band pumping light source including a third amplifying fiber adapted to be pumped in at least one direction while being pumped by the ASE, and output amplified ASE used to pump the second amplifying fiber.
摘要:
Disclosed wideband optical fiber amplifier amplifies and outputs wideband optical signal containing C-band and L-band optical signals. The amplifier includes: a first amplification section amplifying the wideband optical signals; a second amplification section amplifying the separated L-band optical signals amplified by the first amplification section; an optical signal coupler combining and outputting the optical signals amplified by the first and second amplification sections; and an optical circulator. A first port of the optical circulator inputs the wideband optical signals from the optical communication network; a second port outputs the inputted wideband optical signals and inputs spontaneous emissions generated from the first amplification section; a third port provides the spontaneous emissions to the second amplification section while inputting the L-band optical signals amplified by the second amplification section; and a fourth port outputs L-band optical signals that were inputted to the third port to the optical signal coupler.
摘要:
Disclosed is an L-band optical amplifier for amplifying optical signals with the wavelength band of the L-band. The L-band optical amplifier comprises an optical-amplifying section for emitting spontaneous emission and for amplifying the optical signals by pumping of the spontaneous emission, a mirror for reflecting the optical signals amplified by the optical-amplifying section to re-enter back to the optical-amplifying section, and a feedback loop connected with both terminals of the optical-amplifying section for causing spontaneous emission emitted from the optical-amplifying section to be fed back to the optical-amplifying section.
摘要:
Disclosed is a gain-controllable wideband optical fiber amplifier for amplifying both C-band and L-band optical signals, which comprises: a first amplifying section configured to (1) be pumped in at least one direction, (2) amplify both C-band and L-band optical signals and (3) output an amplified spontaneous emission; an optical attenuator for attenuating the power of the spontaneous emission; and a second amplifying section pumped by the attenuated spontaneous emission to secondarily amplify the amplified L-band optical signals.
摘要:
A field programmable gate array (FPGA) for multiplexing data and enable signals input from a plurality of input ports and outputting the multiplexed signal to one output port is disclosed. The FPGA includes a plurality of memories, which are connected to the input ports, for storing the input data and enable signals, respectively, and outputting one-shot signals at trailing edges of the enable signals; and a finite state machine (FSM) for sequentially reading the data signals stored in the memories in an order of the one-shot signals input from the memories.
摘要:
A field programmable gate array (FPGA) for multiplexing data and enable signals input from a plurality of input ports and outputting the multiplexed signal to one output port is disclosed. The FPGA includes a plurality of memories, which are connected to the input ports, for storing the input data and enable signals, respectively, and outputting one-shot signals at trailing edges of the enable signals; and a finite state machine (FSM) for sequentially reading the data signals stored in the memories in an order of the one-shot signals input from the memories.
摘要:
The present invention discloses a long-band Erbium doped-fiber amplifier including: a first Erbium doped fiber with a predetermined length, coupled to a first pumping light source through a first wavelength-selective coupler, for amplifying a C-band optical signal by supplied pumping light; a second Erbium doped fiber with a predetermined length for amplifying an L-band optical signal by a second pumping light source; a feedback loop for recycling a specific C-band wavelength generated in the amplification of the first Erbium doped fiber as the second pumping light source of the L-band optical signal; a tap coupler formed between the first and second Erbium doped fibers, for dividing the optical power amplified in the first Erbium doped fiber, for supplying a predetermined ratio of optical power to the second Erbium doped fiber, and for re-inputting the residual optical power to the feedback loop; and, a second wavelength-selective coupler for coupling the signal light transmitted from the tap coupler to the first Erbium doped fiber.
摘要:
A broadband light source includes an optical amplifier having amplifying mediums connected in series outputs an amplified spontaneous emission light over a wide wavelength range forward or backward. A circulator connected in series to the optical amplifier returns back to the amplifier spontaneous emission light outputted backwardly from the amplifier. A first pumping means located between the circulator and the optical amplifier pumps a pumping light to the optical amplifier, and a second pumping means located after the optical amplifier pumps a pumping light to the optical amplifier.
摘要:
Disclosed is a wide band optical fiber amplifier for amplifying C and L-band optical signal components having an economical configuration, high amplification efficiency while exhibiting a low noise figure. The amplifier includes first and second isolators; first, second, and third amplification units; a distributor; a gain flattening filter; and first and second reflectors. The amplifier receives C and L band optical signals and process the signals by: amplifying C and L band signals; gain flattening the only C band signal twice; amplifying C and L band signals for the second time; splitting the C band signal from L band signal; subjecting L band signal to be amplified three more times; and combining resulting C and L band signals.
摘要:
Disclosed is a dispersion-compensated optical-fiber amplifier including a circulator for outputting an optical signal received at a first terminal to a second terminal, while outputting an optical signal received at the second terminal to a third terminal; a first amplifier for amplifying the optical signal from the second terminal and an optical signal reapplied thereto; a dispersion-compensating fiber for compensating for a dispersion occurring in the optical signal received from the first amplifier and an optical signal reapplied thereto; a second amplifier for amplifying the optical signal from the dispersion-compensating fiber and an optical signal reapplied thereto; a splitter installed on the dispersion-compensating fiber and adapted to output to the dispersion-compensating fiber, an optical signal applied thereto and an optical signal reapplied thereto, while outputting a pumping light applied to one end thereof and adapted to pump both the first and second amplifiers to the other end thereof without allowing the pumping light to pass through the dispersion-compensating fiber; and, a reflector for reflecting back an optical signal from the second amplifier, so that the reflected optical signal is reapplied to the second amplifier, the splitter, the first amplifier, and the circulator, in this order.