Difference Frequency Generation of 5-18 mum in a AgGaSe(2) Crystal.
Mid-infrared radiation in the 5-18-mum range has been obtained by difference frequency generation in a AgGaSe(2) crystal by pumping with the output of a type I LiNbO(3) optical parametric oscillator (OPO). Here we suggest the use of a LiTaO(3) retarder to achieve an orthogonal state of polarization between OPO outputs that are necessary for efficient pumping of a AgGaSe(2) crystal. Several tens of kilowatts of peak power near 8 mum and continuously tunable operation in the above range have been obtained.
Abedin
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KS
Haidar
S
S
Konno
Y
Y
Takyu
C
C
Ito
H
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