Co[sup 2+]:LiGa[sub 5]O[sub 8] saturable absorber passive Q switch for 1.34 μm Nd[sup 3+]:YAlO[sub 3] and 1.54 μm Er[sup 3+]:glass lasers

Denisov, I. A.; Denisov, I.A.; Demchuk, M. I.; Demchuk, M.I.; Kuleshov, N. V.; Kuleshov, N.V.; Yumashev, K. V.; Yumashev, K.V.
October 2000
Applied Physics Letters;10/16/2000, Vol. 77 Issue 16
Academic Journal
Passive Q switching of a Nd[sup 3+]:YAlO[sub 3] laser at 1.34 μm and an Er[sup 3+]: glass laser at 1.54 μm was demonstrated using a Co[sup 2+]:LiGa[sub 5]O[sub 8] crystal as a saturable absorber. Q-switched pulses at 1.34 μm of 13 mJ energy and 90 ns duration and at 1.54 μm of 8 mJ energy and 70 ns duration were obtained. The ground state absorption cross section of the Co[sup 2+]:LiGa[sub 5]O[sub 8] was estimated to be (2.6±0.4)x10[sup -19] cm[sup 2] and (2.5±0.5)x10[sup -19] cm[sup 2] at 1.34 and 1.54 μm, respectively. The [sup 4]T[sub 1]([sup 4]F)→[sup 4]A[sub 2] relaxation time of the Co[sup 2+] ion in the LiGa[sub 5]O[sub 8] crystal was measured to be ∼130 ns. © 2000 American Institute of Physics.


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