【摘 要】
：
A cw operation and a passively Q-switched (PQS) Ho∶SSO laser (Cr2+ ∶ZnSe as a saturable absorber) end-pumped by a Tm∶YAP laser operating at near room tempera
【机 构】
：
College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001
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A cw operation and a passively Q-switched (PQS) Ho∶SSO laser (Cr2+ ∶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 Cr2+ ∶ZnSe is used as the saturable absorber,with transmission of 88.4％ at 2112nm.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 Cr2+∶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 freq uency of 2.65 kHz.
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