Abstract
Quasi-continuous wave (cw) laser action has been demonstrated by direct diode pumping of a new extremely broadband Cr(3+)-doped crystal. In contrast to previous works, where large-frame pump lasers have been employed, we have shown that low-power direct diode pumping of LiInGeO(4) is feasible, opening up the way for realizing compact and efficient laser sources for telecommunication applications.
Highlights
Cr:LiInGeO4 is a relatively new laser active medium, belonging to the olivine group of crystals[1]
Quasi-continuous wave laser action has been demonstrated by direct diode pumping of a new extremely broadband Cr3+-doped crystal
In contrast to previous works, where large-frame pump lasers have been employed, we have shown that low-power direct diode pumping of LiInGeO4 is feasible, opening up the way for realizing compact and efficient laser sources for telecommunication applications
Summary
Cr:LiInGeO4 is a relatively new laser active medium, belonging to the olivine group of crystals[1]. In contrast to the better known materials like Cr4+-doped fosterite (Mg2SiO4)[2] and cunyite (Ca2GeO4)[3], emission has been assigned to Cr3+ in distorted octahedral sites in the case of Cr:LiInGeO4. It features an extremely broad emission spectrum starting at around 900 nm and stretching to 1700 nm, making it a very promising candidate for the generation of ultrashort laser pulses in the for optical telecommunications important nearinfrared wavelength range. Reliable and powerful laser diodes do exist at this wavelength, direct-diode pumping would be highly desirable, as this would open up the possibility to develop compact laser sources with low power consumption, an indispensable requirement for telecommunication applications
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