Optical gain based on NaYF4: Er3+, Yb3+ nanoparticles-doped polymer waveguide under convenient LED pumping

Abstract

The relative optical gains at three near infrared wavelengths (1550 nm, 1064 nm, and 980 nm) were achieved in NaYF4: Er3+, Yb3+ nanoparticle-doped SU-8 waveguides when using two low-cost light-emitting diodes (LEDs) instead of traditional 980 nm semiconductor laser as pump source. The polymer waveguides were fabricated by one-step photolithography process. The fluorescence bands around 1550 nm and 1000 nm wavelengths due to the 4I13/2 → 4I15/2 transition of Er3+ ions and 2F5/2 → 2F7/2 transition of Yb3+ ions were observed under the excitation of 405 nm and 520 nm LEDs. By using the vertical top pumping mode of LEDs, the relative gains of 4.2 dB, 1.7 dB, and 2.1 dB at 1550 nm, 1064 nm, and 980 nm wavelengths were achieved, respectively, on a 10-mm-long waveguide.

Optical temperature-sensing phosphors with high sensitivities in a wide temperature range based on different strategies

“…In the NIR region, broad absorption peaks around 980 nm appeared, which can be assigned to the 2 F 7/2 → 2 F 5/2 transition of Yb 3+ . 29 Fig. 3(a) shows the UC emission spectra of the LS:10%Yb 3+ , xEr 3+ samples for different Er 3+ concentrations from x = 0.5 to 3%, under excitation at 980 nm.…”

“…In the NIR region, broad absorption peaks around 980 nm appeared, which can be assigned to the 2 F 7/2 → 2 F 5/2 transition of Yb 3+ . 29…”

Optical Amplification at 637 and 1067 nm Based on Organic Molecule AQ(PhDPA)2 and NdIII Complex Codoped Polymer Waveguides

“…In recent years, the majority of the previous researches conducted on polymer waveguide amplifiers reported the values of relative gain less than 5.0 and 4.0 dB cm −1 at 0.6 µm and 1.06 µm respectively, as indicated in Figure 11. [1,20,[37][38][39][40][41][42][43][44][45][46][47] Moreover, these polymer waveguide amplifiers all focus on the optical amplification at a single wavelength. Based on AQ(PhDPA) 2 -FDPO (1:4) in this work, the relative gain value of 6.1 dB cm −1 at 637 nm obtained in waveguides with crosssection of 4 × 8 µm 2 is at an advanced level compared with the gains achieved in larger size of waveguides reported so far; in addition, the gain of AQ(PhDPA) 2 -DBFDPO (1:4) of 4.8 dB cm −1 is also a pretty good gain performance at 0.6 µm.…”

Energy transfer characteristics of single-particle NaYF₄ core-shell structure

“…20%Yb 3+ /2%Er 3+ @NaYbF 4 核-壳-壳微米核壳结 构的(101)衍射峰强度强于(110)衍射峰强度, 表 明包覆多层壳层后微米晶体优先沿a轴方向生长 (如图2插图所示) [24] . 传 递 [26] .…”