Compact Multi-Watt 2 to 2.13um Holmium Doped Fiber Laser Transmitter for Space

This proposal addresses the NASA#39;s need for innovative multi Watt (1W amp;5W) polarization maintaining (PM) fiber amplifier and laser transmitter modules in the 2 micron atmospheric transmission window band, and in particular at the 2051nm wavelength. Our OEM modules besides being compact, lightweight, power efficient and rugged, will integrate optics, electronics and electrical amp; computer control interfaces. nbsp;Such features will make it an ideal product for integration in future NASA airborne or space systems. The design of amplifier or laser will use a novel PM single cladnbsp; Holmium doped fiber (HDF) that offers nbsp;a broad (150nm ) wavelength emission band (i.e. 2000 to 2150nm), an excellent nbsp;optical efficiency (75%) and a combination of attractive performance, such as large gain (40dB) andnbsp; dynamic range (gt;30dB).nbsp;We will demonstrate both 1W amp; 5W laser transmitters at 2051nm intonbsp;our compact 1W-MAKO OEM (97x78x15mm3) and a 5W-SKYLINE OEM (200x150x43mm3), and fully evaluate their performance, first in a CW mode and next in a ns regime -10 to100 kHz pulse repetition nbsp;frequency. This innovation will pave the way in the use of this PM HDF transmitter modules asnbsp; building blocks for more complex amplifier topologies and diverse nbsp;emission wavelengths.