Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications

Guangzhou, China

Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications

Guangzhou, China
SEARCH FILTERS
Time filter
Source Type

Ye P.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Ye P.,Jinan University | Zhu S.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Zhu S.,Jinan University | And 10 more authors.
Optics Express | Year: 2017

A compact dual-wavelength passively Q-switched green laser by intra-cavity frequency doubling of a Yb:YAG/Cr4+: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 9.7 W, and the corresponding slope efficiency is 15.2%. The shortest pulse width, largest pulse energy, and highest peak power were achieved to be 5.54 ns, 246.1μJ, and 40.76 KW, respectively. Dual-wavelength laser oscillation simultaneously at 515 nm and 524.5 nm has been achieved. This passively Q-switched dualwavelength green laser can be used as a laser source for Terahertz generation. © 2017 Optical Society of America.


Nie H.,Shandong University | Zhang P.,CAS Shanghai Institute of Optics and fine Mechanics | Zhang P.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Zhang B.,Shandong University | And 8 more authors.
Optics Letters | Year: 2017

A diode-end-pumped continuous-wave (CW) and passively Q-switched Ho, Pr :LiLuF4 (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. By using a monolayer graphene as the saturable absorber, the passively Q-switched operation was realized, in which regimes with the highest output power, the shortest pulse duration, and the maximum repetition rate were determined to be 88 mW, 937.5 ns, and 55.7 kHz, respectively. The laser beam quality factor M2 at the maximum CW output power were measured to be Mx 2 = 1.48 and My 2 = 1.47. © 2017 Optical Society of America.


Fu S.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Fu S.,Jinan University | Deng Z.,South China Agricultural University | Li Z.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | And 10 more authors.
Optics Express | Year: 2017

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. The stored light pulse in a microcavity can be possibly released, by nonlinearly interacting with the lateral incident control pulse. Importantly, by breaking the symmetry of potential cavity, the stably trapped light pulse can be successfully released from the microcavity to the expected direction. Owing to the induced optical nonlinearity, the released ultrashort light pulses could preserve their shapes, propagating in a form of Bragg grating solitons through the uniform component, which is in contrast to the extensively studied light pulse trappings in photonic crystal cavities which operate at the linear regime. © 2017 Optical Society of America.


Zhang P.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Zhang P.,Jinan University | Chen Z.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Chen Z.,Jinan University | And 9 more authors.
Infrared Physics and Technology | Year: 2017

Single crystal of Ho3+/Yb3+ co-doped PbF2 has been grown successfully by the conventional technique modified Bridgman method. The spectral parameters of Ho3+ were calculated based on the Judd-Ofelt theory. The transition probabilities, radiative lifetime, and branching ratios were also estimated in detail by the J-O parameters obtained. The 2 μm emission characteristic and fluorescence lifetime of the 5I7 manifold upon excitation of a conventional 970 nm laser diode were measured and investigated. Fuchtbauer-Ladenburg theory was applied to calculate the absorption, emission, and gain cross sections of 5I7→5I8 transition. Based on examination of spectroscopic parameters evaluated, we suggest Ho3+/Yb3+ co-doped PbF2 crystal is a promising candidate for efficient 2 μm laser. © 2017 Elsevier B.V.


Jiang W.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Jiang W.,University of Manchester | Jiang W.,Jinan University | Li Z.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | And 9 more authors.
Optics Express | Year: 2017

We have experimentally demonstrated passively Q-switched (PQS) stimulated Raman scatting (SRS) emissions in an a-cut YVO4 Raman crystal in a coupled cavity, using a Yb: YAG/YAG/Cr4+: YAG/YAG composite crystal to generate the PQS fundamental laser, for the first time, to our best knowledge. At the incident pump power of 6.30 W, the Stokes average output power of 0.42 W was achieved. Due to the cascaded Raman effect, four first-Stokes lines operating at 1092.6 nm, 1125.4 nm, 1135.1 nm and 1157.0 nm and three second-Stokes lines operating at 1210.6 nm, 1263.2 nm and 1290.1 nm were generated simultaneously. It is noted that the spectral broadening of the fundamental field was observed. With the inclusion of an etalon in the fundamental cavity to suppress the spectral broadening, the average output power of the Stokes lines increased to 0.49 W and the maximum pulse energy was enhanced up to 84.30 µJ, corresponding to the diode-to-Stokes conversion efficiency of 7.78%. © 2017 Optical Society of America.


Zhang P.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Zhang P.,Jinan University | Hang Y.,CAS Shanghai Institute of Optics and fine Mechanics | Li Z.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | And 11 more authors.
Optics Letters | Year: 2017

The use of Nd3+ codoping for sensitizing the Ho3+ ion and enhancing the ∼3.9 μm emission from Ho3+:5I5 → 5I6 was investigated in the PbF2 crystal for the first time, to the best of our knowledge. The ∼3.9 μm fluorescence emission properties and energy transfer mechanism of the as-grown crystals were investigated. The results show that the Nd3+ ion can act as a sensitizer to the Ho3+ ion, providing an efficient excitation channel, making the Ho3+∕Nd3+:PbF2 crystal propitious to be pumped by commercialized InGaAs laser diodes (LDs). Moreover, an enhanced ∼3.9 μm emission was obtained in the Ho3+∕Nd3+:PbF2 crystal due to the codoping of Nd3+ ions, leading to an efficient energy transfer from a lower laser level of Ho3+:5I6 to Nd3+:4I15∕2, while having little influence on the higher laser level of Ho3+:5I5. These advantageous spectroscopic characteristics indicate that the Ho3+∕Nd3+:PbF2 crystal might have potential application in ∼3.9 μm mid-infrared lasers under a conventional 808 nm LD pump. © 2017 Optical Society of America.


Zhu S.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Zhu S.,Jinan University | Zhang P.X.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Zhang P.X.,Jinan University | And 14 more authors.
Optical Materials Express | Year: 2017

The Yb3+:BaGd2(MoO4)4 crystal was grown by the Czochralski method and investigated. The absorption and emission spectra reveal that this crystal can be efficiently excited by a commercial laser diode (LD) around 970 nm and its strongest fluorescent peak locates at 1013 nm. Besides, a significant frequency-doubling effect and a Raman effect of the crystal were observed in the experiment, which reveals that the rare-earth (RE) ions doped BaGd2(MoO4)4 crystal has the potential to generate the self-frequency-doubling laser and self- Raman laser simultaneously. © 2017 Optical Society of America.


Zhang P.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Zhang P.,Jinan University | Chen Z.,Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications | Chen Z.,Jinan University | And 11 more authors.
Optics Express | Year: 2016

The use of Pr3+ codoping for enhancement of the transition of Er3+ : 4I11/2 → 4I13/2 2.7 μm emissions was investigated in the Er/Yb codoped LiNbO3 crystal for the first time. It is found that the codoped of Pr3+ ion in Er3+, Yb3+ and Pr3+ triply doped LiNbO3 crystal (Er/Yb/Pr: LN) greatly enhances Er3+: 2.7 μm emission under excitation of a common 970 nm laser diode, depopulates the lower laser level of Er3+:4I13/2, and has little influence on the higher laser level of Er3+:4I11/2 at the same time for population inversion. The 2.7 μm emission characteristics and energy transfer were investigated in detail. The energy transition efficiency from the lower laser level of Er3+:4I13/2 to Pr3+:3F4 level is as high as 0.42, indicating that the Pr3+ ion is an effective deactivation ion for Er3+ ion in LiNbO3 crystal. These results suggest that Er/Yb/Pr: LiNbO3 crystal may become an attractive host for developing solid state lasers at around 2.7 μm under a conventional 970 nm LD pump. © 2016 Optical Society of America.

Loading Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications collaborators
Loading Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications collaborators