نتایج جستجو برای: optical fibre amplifier
تعداد نتایج: 306430 فیلتر نتایج به سال:
The demands for greater spectral efficiency, higher line rate, higher channel count, greater amplifier/repeater spacing, Tb/s capacity DWDM long haul optical communication systems, efficient transmission of optical channels over long-haul optical fibre system is essential. Since the conventional Return to zero (RZ) and Non return to zero (NRZ) modulation formats suffer from dispersion and ineff...
A CW Nd:YAG master oscillator power amplifier with fibre based SBS phase conjugate mirror is reported. A four-pass amplifier configuration is employed to compensate pump induced thermal lens and birefringence in the amplifier rod in conjunction with a fibre phase conjugator to achieve diffraction limited output beam quality. Maximal attainable gain of ;1.9 for the system is obtained. Applicatio...
چکیده ندارد.
We describe a single-mode superfluorescent Er/Yb optical fibre source capable of generating greater than 1 Watt of output power. The spectral bandwidth of the source can be varied between 0.5 and 4 nm by filtering. Superfluorescent sources based on rare-earth doped single mode fibres [ 1,2] are potentially useful in many applications requiring high brightness combined with broad bandwidth and l...
The tremendous growth of the high speed Internet and data traffic has created an enormous demand for transmission bandwidth of dense wavelength division multiplexed (DWDM) optical communication systems. With the advancement of wideband fiber-optical amplifiers, DWDM optical transmission systems are capable of providing capacities in excess of hundreds of gigabits per second over hundreds of kil...
The trade-off between gain efficiency and noise figure is evaluated for an optimised EDFA pumped at 980nm. It is shown that operating at rrirxfmum gain efficiency elwavs results in an increased noise figure well above the 3dB quantum limit and that any attempt to reduce the amplifier noise figure results in a decrease in gain efficiency. Alternatively, for a fixed amplifier gain and pump power,...
چکیده ندارد.
In a non-reciprocal optical amplifier, gain depends on whether the light propagates forwards or backwards through device. Typically, one requires either magneto-optical effect, temporal modulation nonlinearity to break reciprocity. By contrast, here we demonstrate amplification of fibre-guided using Raman provided by spin-polarized atoms that are coupled nanofibre waist tapered fibre section. T...
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