The mode and wavelength of a conventional, multi-mode, wide-stripe laser diode is converted in an Nd3 ion-doped laser host crystal to a stable, single-mode output that falls within the spectral region required for pumping EDFA amplifying structures. The host crystal absorbs radiation from the diode that...http://www.google.ca/patents/US6587496?utm_source=gb-gplus-sharePatent US6587496 - Single-mode pump power source
