کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1493928 1510792 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Efficient upconversion-pumped continuous wave Er3+:LiLuF4 lasers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Efficient upconversion-pumped continuous wave Er3+:LiLuF4 lasers
چکیده انگلیسی


• We present detailed spectroscopic investigations of Er3+:LiLuF4 (Er:LLF) crystals.
• We prove Er:LLF to be an efficient continuous-wave (cw) upconversion-laser material.
• We demonstrate the highest crystalline upconversion laser cw output power at 300 K.
• We realize the first crystalline upconversion waveguide laser.

We report on detailed spectroscopic investigations and efficient visible upconversion laser operation of Er3+:LiLuF4. This material allows for efficient resonant excited-state-absorption (ESA) pumping at 974 nm. Under spectroscopic conditions without external feedback, ESA at the laser wavelength of 552 nm prevails stimulated emission. Under lasing conditions in a resonant cavity, the high intracavity photon density bleaches the ESA at 552 nm, allowing for efficient cw laser operation.We obtained the highest output power of any room-temperature crystalline upconversion laser. The laser achieves a cw output power of 774 mW at a slope efficiency of 19% with respect to the incident pump power delivered by an optically-pumped semiconductor laser. The absorption efficiency of the pump radiation is estimated to be below 50%.To exploit the high confinement in waveguides for this laser, we employed femtosecond-laser pulses to inscribe a cladding of parallel tracks of modified material into Er3+:LiLuF4 crystals. The core material allows for low-loss waveguiding at pump and laser wavelengths. Under Ti:sapphire pumping at 974 nm, the first crystalline upconversion waveguide laser has been realized. We obtained waveguide-laser operation with up to 10 mW of output power at 553 nm.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 42, April 2015, Pages 167–173
نویسندگان
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