Optical amplifier for amplifying light in a long wavelength...

Optical amplifier for amplifying multi-wavelength light

Optical amplifier for amplifying multi-wavelength light

Optical amplifier for amplifying multi-wavelength light

Optical amplifier for bi-directional WDM optical communications

Optical amplifier for collectively amplifying optical signals ha

Optical amplifier for use in optical communications equipment

Optical amplifier for use in optical communications equipment

Optical amplifier for use in optical communications equipment

Optical amplifier for wavelength multiplex transmission

Optical amplifier for wavelength-division multiplexing

Optical amplifier gain control

Optical amplifier gain control

Optical amplifier gain control

Optical amplifier gain control circuitry using a variable refere

Optical amplifier gain control method for optical amplifier...

Optical amplifier having a variable attenuator controlled based

Optical amplifier having an improved noise figure

Optical amplifier having automatic gain control using the...

Optical amplifier having automatic gain control with...