Farhad Hakimi

Integrated-optic Nd:glass laser fabricated by flame hydrolysis deposition using chelates

We have demonstrated an Nd:glass waveguide laser deposited on a silica substrate by flame hydrolysis deposition using chelates. Continuous-wave lasing at lambda = 1062 nm was verified with a threshold of 143 mW and a slope efficiency of 2.1% when the laser was pumped at 807 nm. The flame hydrolysis deposition process using rare-earth chelates produces low-loss films with high Nd concentration and is suitable for multiple rare-earth doping.

Photonic Crystal Fiber IFOGs

We have built and tested an interferometric fiber-optic gyroscope made with photonic crystal fiber. This paper reports the test results and examines the advantages of photonic crystal fiber for this type of gyroscope.

Glass fiber laser at 1. 36. mu. m from SiO sub 2 :Nd

By adding 14 mol % P{sub 2}O{sub 5} to the core of a SiO{sub 2}:Nd fiber, laser emission was obtained at 1.36 {mu}m. From the fluorescent spectra and laser thresholds for the {sup 4}{ital F}{sub 3/2} to {sup 4}{ital I}{sub 11/2} and {sup 4}{ital F}{sub 3/2} to {sup 4}{ital I}{sub 3/2} transitions, the net gain at 1.36 {mu}m is 0.024 dB/mW, and the ratio of excited-state absorption (the {sup 4}{ital F}{sub 3/2} to {sup 4}{ital G}{sub 1/2} transition) to stimulated emission is estimated to be 0.78.

Glass fiber laser at 136 μm from SiO_2:Nd

By adding 14 mol % P{sub 2}O{sub 5} to the core of a SiO{sub 2}:Nd fiber, laser emission was obtained at 1.36 {mu}m. From the fluorescent spectra and laser thresholds for the {sup 4}{ital F}{sub 3/2} to {sup 4}{ital I}{sub 11/2} and {sup 4}{ital F}{sub 3/2} to {sup 4}{ital I}{sub 3/2} transitions, the net gain at 1.36 {mu}m is 0.024 dB/mW, and the ratio of excited-state absorption (the {sup 4}{ital F}{sub 3/2} to {sup 4}{ital G}{sub 1/2} transition) to stimulated emission is estimated to be 0.78.