Integrated optical distributed feedback laser with Ti:Fe:Er:LiNbO[sub 3] waveguide

Das, B. K.; Ricken, R.; Sohler, W.
March 2003
Applied Physics Letters;3/10/2003, Vol. 82 Issue 10, p1515
Academic Journal
A distributed feedback (DFB) laser in LiNbO[sub 3] is demonstrated using a Ti:Fe:Er:LiNbO[sub 3] waveguide with a holographically written photorefractive grating. The DFB laser was combined with a waveguide amplifier on the same substrate. Up to 1.12 mW of output power at λ = 1531.35 nm was emitted by the laser/amplifier combination at a pump power level of 240 mW (λ[sub P] = 1480 nm). The emission spectrum consists of the two lowest-order DFB modes of about 3.9 GHz frequency spacing. Whereas the measured threshold gain of ∼3.3 dB/cm approximately agreed with the modeling results, the observed mode spacing was clearly smaller than calculated.


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