| Autor: |
Mollaee, Masoud, Zhu, Xiushan, Zong, Jie, Wiersma, Kort, Chavez-Pirson, Arturo, Norwood, R. A., Peyghambarian, N. |
| Zdroj: |
IEEE Photonics Technology Letters; 9/1/2018, Vol. 30 Issue 17, p1563-1566, 4p |
| Abstrakt: |
All-fiber single-transverse-mode laser oscillators operating at 785 nm were demonstrated by splicing a 0.1 mol% Tm3+-doped fluoride fiber with a core diameter of $4~\mu \text{m}$ and a numerical aperture of 0.07 to a pair of silica fiber Bragg gratings. About 500 mW of continuous-wave single transverse mode laser output at 784.5 nm with a 3-dB spectral bandwidth of 0.2 nm was obtained by upconversion pumping a 3-m-long gain fiber at 1125 nm. Our experiments show that the ground-state absorption of Tm3+ at 785 nm is the origin of low efficiency in previous reports. The efficiency of this all-fiber laser can be improved by using a gain fiber with an optimized overlap between the laser, the pump, and the fiber core, and employing new pumping schemes that deplete the ground state sufficiently. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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