Diode-pumped Kerr-lens mode-locked ytterbium-doped compositional mixed calcium aluminate laser.

A diode-pumped Kerr-lens mode-locked laser generating 25 fs pulses at 1080 nm is demonstrated with an Yb-doped compositional mixed calcium aluminate crystal. The Yb:Ca(Gd,Y)AlO laser, which operates at a repetition rate of 65.6 MHz via soft-aperture Kerr-lens mode-locking, is pumped by a spatially single-mode, fiber-coupled diode laser.

Polarization switching in a mid-infrared Er:YAlO laser.

We report on a polarization-resolved study of mid-infrared emission properties of Er-doped orthorhombic yttrium aluminum perovskite YAlO single crystal. For the I→ I Er transition, the stimulated emission cross section is 0.20 × 10cm at 2919 nm for light polarization E ‖ c.

28.02 W LD side-pumped CW laser operated at 2.8 µm in YSGG/Er:YSGG/YSGG crystal.

We demonstrated a 978 nm laser diode (LD) side-pumped YSGG/Er:YSGG/YSGG composite crystal with a size of Ф 3 mm × 65 mm and continuous-wave (CW) mode. By optimizing resonator length and output mirror transmittance, a maximum output power of 28.02 W is generated, corresponding to slope efficiency of 17.

Spectral broadening of a mixed Nd: CYGA crystal with tunable laser operation beyond 1100 nm.

A broader emission band of the novel Nd: CaYGdAlO (Nd: CYGA) mixed crystal was proved by the introduction of Gd ions in Nd: CaYAlO (Nd: CYA) crystal, and a diode-pump tunable Nd: CYGA laser operation was achieved successfully. Due to the broad emission spectrum with the full width at half maximum (FWHM) of 23 nm, a tuning range of 32 nm from 1075 nm to 1107 nm was achieved, and the results were considered to be the first time for Nd-doped crystals to be tuned to such a long wavelength at 1107 nm, which promotes the further development of near-infrared tunable lasers. The maximum output power was 1.

Kerr-lens mode-locked ytterbium-activated orthoaluminate laser.

We report on the first, to the best of our knowledge, Kerr-lens mode-locked laser based on an Yb-doped perovskite-type orthoaluminate crystal exploiting two different principal light polarizations. The Yb:(Y,Gd)AlO laser delivers soliton pulses as short as 32 fs at 1067 nm with an average output power of 328 mW and a pulse repetition rate of ∼84.6 MHz for E || a polarization.

Diode-pumped SESAM mode-locked Yb:(Y,Gd)AlO laser.

We report on the continuous-wave (CW) and mode-locked (ML) laser performance of an Yb-doped yttrium-gadolinium orthoaluminate crystal, Yb:(Y,Gd)AlO. Pumping by a single-transverse-mode fiber-coupled 976 nm InGaAs laser diode, the maximum output power in the CW regime amounted to 429 mW at 1041.8 nm corresponding to a slope efficiency of 51.

Dual effects on Ho ∼4.0 μm emission by Nd ions in (Y,Gd)AlO crystal.

For the first time, to the best of our knowledge, the use of Nd codoping for enhancing the ∼4.0 m emission from the Ho:I → I transition was investigated in a Ho, Nd-codoped GdYAlO [(Y,Gd)AlO] crystal [Ho/Nd:(Y,Gd)AlO]. In this study, the ∼4.

Intense 2.1-4.2 µm broadband emission of Co/Er:PbF mid-infrared laser crystal.

A novel mid-infrared (MIR) laser crystal /: was successfully grown. The use of ion co-doping to sensitize a ion and enhance the 2.1-4.

Yb:GdScO crystal for efficient ultrashort pulse lasers.

We present, to the best of our knowledge, the first demonstration of thermal, optical, and laser properties of : for potentially efficient ultrashort pulse lasers. The stimulated emission cross section at 1025 nm (E//c) is 0.46×10 with the emission band width of 85 nm, even broader than the well-known :.

Efficient enhancement of bismuth near infrared luminescence by the co-doping of tantalum in GYAP crystal.

Bi/Ta double doped GdYAlO (Bi/Ta:GYAP) near-infrared (NIR) laser crystal was successfully grown. The codoping of Ta was demonstrated to effectively enhance the NIR fluorescence emission in Bi/Ta:GYAP crystal for the first time. The introduced Ta ion can induce the change of valence states from Bi to Bi based on the charge compensation mechanism, bringing about the enhanced NIR fluorescence emission.

Charge compensation effects of Yb on the Bi: near-infrared emission in PbF crystal.

The use of Yb codoping for enhancing the near-infrared (NIR) emission in Bi, Yb codoped PbF crystal was investigated for the first time, to the best of our knowledge. The NIR and visible fluorescence emission properties of the as-grown crystals were investigated in detail. It was found that the Yb ion can act as an effective charge compensated ion to bring about the conversion from Bi to Bi, enhancing the NIR fluorescence emission in Bi:PbF crystal.

Sensitization and deactivation effects of Ndon the Ho : 3.9 μm emission in a PbF crystal.

The use of Nd codoping for sensitizing the Ho ion and enhancing the ∼3.9  μm emission from Ho:I5→I5 was investigated in the PbF crystal for the first time, to the best of our knowledge. The ∼3.

Directional release of the stored ultrashort light pulses from a tunable Bragg-grating microcavity.

We demonstrate numerically the ability for directionally releasing the stored ultrashort light pulse from a microcavity by means of two-pulse nonlinear interaction in a cascading Bragg grating structure. The setting is built by a chirped grating segment which is linked through a uniform segment, including a tunable microcavity located at the junction between the two components. Our simulations show that stable trapping of an ultrashort light pulse can be achieved in the setting.

Passively Q-switched dual-wavelength green laser with an Yb:YAG/Cr:YAG/YAG composite crystal.

A compact dual-wavelength passively Q-switched green laser by intra-cavity frequency doubling of a Yb:YAG/Cr:YAG/YAG composite crystal was demonstrated for the first time to our best knowledge. The maximum green laser output power of 1.0 W was obtained under the pump power of 9.

Diode-end-pumped Ho, Pr:LiLuF bulk laser at 2.95 μm.

A diode-end-pumped continuous-wave (CW) and passively Q-switched Ho, Pr:LiLuF (Ho, Pr:LLF) laser operation at 2.95 μm was demonstrated for the first time, to the best of our knowledge. The maximum CW output power was 172 mW.

Enhanced 2.7 μm mid-infrared emissions of Er via Pr deactivation and Yb sensitization in LiNbO crystal.

The use of Pr codoping for enhancement of the transition of Er: I → I 2.7 μm emissions was investigated in the Er/Yb codoped LiNbO crystal for the first time. It is found that the codoped of Pr ion in Er, Yb and Pr triply doped LiNbO crystal (Er/Yb/Pr: LN) greatly enhances Er: 2.

Intense 2.89 μm emission from Dy³⁺/Yb³⁺-codoped PbF₂ crystal by 970 nm laser diode pumping.

A novel Dy(3+)/Yb(3+) co-doped PbF2 mid-IR laser crystal was successfully grown using the vertical Bridgman method. Efficient emission at around 3 μm from the crystal was observed under excitation of a conventional 970 nm laser diode (LD). The energy transfer efficiency from Yb(3+) to Dy(3+) in Dy(3+)/Yb(3+):PbF2 crystal is as high as (97.

760 fs diode-pumped mode-locked laser with Yb:LuAG crystal at 1032 nm.

In this study, we experimentally demonstrate the generation of 760 fs pulse duration from a diode-pumped Yb:LuAG mode-locked laser at 1032 nm. At the repetition rate of 58.6 MHz, the maximum average power of 1.

Enhanced emission of 2.86 μm from diode-pumped Ho(3+)/Yb(3+)-codoped PbF(2) crystal.

A novel Ho(3+)Yb(3+)-codoped PbF(2) mid-IR laser crystal was successfully grown and analyzed. Enhanced emission at 2.86 μm was observed from the crystal under excitation of a common 970 nm laser diode for the first time.

Fabrication and characterization of cerium-doped terbium gallium garnet with high magneto-optical properties.

High optical quality (Tb((1-x))Ce(x))₃Ga₅O₁₂ (TCGG) single crystal has been grown by the Czochralski method. The optical and magneto-optical properties of the TCGG are analyzed in detail and the Verdet constant (V) of TCGG is compared with that of undoped terbium gallium garnet (TGG) crystal. TCGG presents a very high transmittance, particularly in the visible-near infrared (VIS-NIR) region, and its V is obviously larger than that of TGG in the VIS-NIR region.

Intense 2.8 μm emission of Ho³⁺ doped PbF₂ single crystal.

A Ho³⁺-doped PbF₂ mid-IR laser crystal was successfully grown using the vertical Bridgman method. An intense 2.8 μm emission in Ho:PbF₂ crystal was observed for the first time.

Efficient dual-wavelength Nd:LuLiF4 laser.

We report an efficient continuous-wave (CW) and passively Q-switched dual-wavelength Nd:LuLiF4 laser at 1314 and 1321 nm for the first time. Maximum CW output power of 6.08 W is obtained, giving an optical-to-optical conversion efficiency of 30.

Efficient 1856 nm emission from Tm,Mg:LiNbO3 laser.

Efficient continuous-wave laser emission at 1856 nm from a Tm,Mg:LiNbO(3) crystal slab with high Tm(3+) doping concentration is reported. A maximum output power of 2.62 W is realized with a slope efficiency of 19.

Deactivation effects of the lowest excited state of Ho3+ at 2.9 μm emission introduced by Pr3+ ions in LiLuF4 crystal.

The use of Pr3+ codoping for enhancement of the Ho3+:5I6 →5I7 mid-IR emissions were investigated in the LiLuF4 crystal for the first time. It was found that Pr3+ greatly increased Ho3+ 2.9 μm emission by depopulating the Ho3+:5I7 level while having little influence on the Ho3+:5I6 level, leading to greater population inversion.