| US 9,812,837 B2 | ||
| Ultrashort pulse fiber amplifier with rare-earth doped gain fibers | ||
| Shibin Jiang, Tucson, AZ (US); Tao Luo, Tucson, AZ (US); Qing Wang, Tucson, AZ (US); and Lei Pan, Tucson, AZ (US) | ||
| Assigned to ADVALUE PHOTONICS, INC., Tucson, AZ (US) | ||
| Filed by AdValue Photonics, Inc., Tucson, AZ (US) | ||
| Filed on May 22, 2017, as Appl. No. 15/601,748. | ||
| Application 15/601,748 is a continuation in part of application No. 14/802,861, filed on Jul. 17, 2015. | ||
| Application 14/802,861 is a continuation in part of application No. 14/605,740, filed on Jan. 26, 2015, granted, now 9,581,760, issued on Feb. 28, 2017. | ||
| Prior Publication US 2017/0264067 A1, Sep. 14, 2017 | ||
| Int. Cl. G02B 6/036 (2006.01); H01S 3/067 (2006.01); H01S 3/16 (2006.01); H01S 3/094 (2006.01) | ||
| CPC H01S 3/06729 (2013.01) [H01S 3/06712 (2013.01); H01S 3/06716 (2013.01); H01S 3/1618 (2013.01); H01S 3/094003 (2013.01)] | 5 Claims |
| 1. A 1.01 to 1.12 micron wavelength ultrashort pulse fiber amplifier with pulse width from 200 ps to 200 fs, comprising: an
Ytterbium doped multicomponent glass gain fiber for laser amplification from 1.01 to 1.12 micron wavelength, comprising:
a core; and
a cladding;
wherein said core comprises:
at least 2 weight percent glass network modifier selected from BaO, CaO, MgO, ZnO, PbO, K2O, Na2O, Li2O, Y2O3, and combinations thereof; and
ytterbium oxide at a level from about 3 to about 50 weight percent;
wherein:
a mode of the core is guided with step index difference between the core and the cladding;
a numerical aperture of the gain fiber is between 0.01 and 0.04;
a core diameter is from 60 microns to 150 microns;
a length of the gain fiber is shorter than 60 cm,
wherein said fiber amplifier comprises no pulse stretching devices and no pulse compressing devices.
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