Erbium-doped fiber amplifier pump array
AssigneeLite Cycles, Inc.
InventorsJames T. Murray, William Austin
Life of this patent
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Abstract
A multimode source, such as a high-power laser diode bar, to pump an Nd3+ doped region defined in a cavity of a monolithic crystal structure. The axial length L1 of the doped region is chosen to optimize energy absorption from the multimode source while minimizing resonant re-absorption loss to unpumped Nd3+ ions. The next proximal cavity length L2 is an undoped region whose length is chosen to optimize the lowest order or fundamental spatial mode (“mode 9”) of the cavity. Advantageously, multi-parameter numerical optimization techniques may be employed in which the parameter set (e.g., doped length, L1, doping concentration, pump beam spot size, micro laser cavity length, and output coupler reflectivity) is varied to determine the overall optimal length L1opt.
Claims16
A microlaser power source comprising:
- a multi-mode wide stripe laser diode and a crystal structure adjoining said diode, said structure having a cavity adapted to be pumped by said diode, said crystal structure having an Nd3+ doped section and an un-doped section, wherein the axial length L1 of said doped section is chosen to optimize energy absorption from said diode while minimizing resonant re-absorption loss to unpumped Nd3+ ions.
A microlaser power source comprising:
- a heat sink;
- a multimode laser diode bar mounted on said heat sink;
- a monolithic crystal structure adjoining said laser diode bar on said heat sink, said crystal structure having an Nd3+ doped section and an un-doped section, wherein the axial length L1 of said doped section is chosen to optimize energy absorption from said diode while minimizing resonant re-absorption loss to unpumped Nd3+ ions.
Dependencies are inferred from the claim text.