| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Passively Q-Switched Ho:SSO Laser by Use of a Cr$^{2+}$:ZnSe Saturable Absorber |
| Xiao-Tao Yang, Long Liu**, Wen-Qiang Xie |
College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001
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| Cite this article: |
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Xiao-Tao Yang, Long Liu, Wen-Qiang Xie 2017 Chin. Phys. Lett. 34 024201 |
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Abstract A cw operation and a passively Q-switched (PQS) Ho:SSO laser (Cr$^{2+}$:ZnSe as a saturable absorber) end-pumped by a Tm:YAP laser operating at near room temperature are reported. It is the first time to report a PQS Ho:SSO laser. For the cw mode, a maximum cw output power of 3.0 W is obtained, corresponding to a slope efficiency of 31.4%. For the PQS mode, a Cr$^{2+}$:ZnSe is used as the saturable absorber, with transmission of 88.4% at 2112 nm. A maximum pulse energy of 1.29 mJ is obtained, corresponding to the pulse repetition frequency of 2.42 kHz. In this study, we change the distance between Cr$^{2+}$:ZnSe and the output mirror to research the pulse characteristic of the PQS Ho:SSO laser. The minimum pulse width of 73.5 ns is obtained, corresponding to the pulse energy of 0.9 mJ and the pulse repetition frequency of 2.65 kHz.
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Received: 08 November 2016
Published: 25 January 2017
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| Fund: Supported by the National Natural Science Foundation of China under Grant No 61405046, and the Natural Science Foundation of Heilongjiang Province under Grant No 51305089. |
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