Accession Number : AD1033878


Title :   All-Glass Fiber Amplifier Pumped by Ultra-High Brightness Pumps


Descriptive Note : Technical Report


Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LEXINGTON United States


Personal Author(s) : Shatrovoy,Oleg ; Yu,Charles X ; Fan,T Y


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1033878.pdf


Report Date : 15 Feb 2016


Pagination or Media Count : 6


Abstract : We investigate high brightness pumping of multi-kW fiber amplifier in a bi-directional pumping configuration. Each pump outputs 2 kW in a 200 m, 0.2 NA multi-mode fiber. Specialty gain fibers, with 17 m MFD and 5-dB/meter pump absorption, have been developed. The maximum fiber amplifier output power is 2550 W, limited by multi-mode instability, with 90% O-O efficiency and M2 1.15. The fiber amplifier linewidth is 12 GHz. We also present kW fiber amplifier results using gain fiber with metalized fiber coating.


Descriptors :   amplifiers , Pumps , brightness , lasers , optical fiber lasers , brightness , coatings , modulators , fibers


Subject Categories : Electrical and Electronic Equipment
      Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE