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We directly measure the spatially and spectrally resolved gain of erbium doped multicore and few mode fiber amplifiers using a coherent swept wavelength interferometer operated in the reflection mode. It greatly simplifies the characterization of multispatial mode amplifiers because it enables characterization of the mode-dependent gain with only a single mode-selective multiplexer at the input. The...
We directly measure the optimum length and the mode-dependent gain of multi-core and few-mode optical amplifiers using a swept wavelength interferometer operated in reflection mode. The technique requires only one space multiplexer and eliminates cut-backs.
We demonstrate a multimode cladding-pumped fiber amplifier that supports 10 modes with 2-dB mode-dependent gain, 20-dB gain, and 25-dBm output power. The mode-dependent gain is minimized using an oversized core supporting additional modes.
An efficient conductance cancellation method is introduced to achieve high gain operational amplifiers. Without the aid of any tuning circuit, in IBM 130nm CMOS process, the post-layout simulation results show that proposed method is able to maintain a DC gain boost of over 23.2dB under temperatures between −40°C and 80°C, of over 21.1dB under supply voltage between 1.3V and 1.8V, and of over 22.5dB...
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