Tailoring the nonlinear refractive index of fluoride-phosphate glasses for laser applications

Töpfer, T.; Hein, Joachim; Philipps, J.; Ehrt, D.; Sauerbrey, R.

doi:10.1007/s003400000240

Cited by 56 publications

(33 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fluorophosphate (FP) glasses combine significant advantages of the fluoride and phosphate glass, and own a less complex fabrication route than that of fluoride and chalcogenide glasses [14]. They are characterized by good moisture resistance, high solubility for rare-earth ions, and broad absorption and emission bands [15,16]. In particular, FP glasses appear interesting for high power solid state lasers due to their low nonlinear refractive index, which will minimize associated phenomena such as self-focusing and self-phase modulation in high power lasers and ensure the highest possible laser intensity on targets [15].…”

mentioning

confidence: 99%

Intense 27 μm and broadband 20 μm emission from diode-pumped Er^3+/Tm^3+/Ho^3+-doped fluorophosphate glass

Tian

et al. 2011

Opt. Lett.

View full text Add to dashboard Cite

This Letter reports intense emission at 2:7 μm and broadband emission at 2:0 μm from Er 3þ =Tm 3þ =Ho 3þ -doped fluorophosphate glass. The fluorescence characteristics and energy transfer upon excitation of a conventional 980 nm laser diode are investigated. Based on the fluorescence spectra and lifetime measurement, the effect of Tm 3þ and Ho 3þ ions on intense 2:7 μm emission in fluorophosphate glass is demonstrated. It is also found that the effective bandwidth of 2:0 μm emission due to Recently, the development of mid-IR diode-pumped solid state lasers has been an area of great interest due to their various useful applications including military, remote sensing, eye-safe laser radar, and medical surgery [1,2]. Er 3þ -doped glass is well suited for the above applications owing to its 2:7 μm emission, which is close to the most pronounced absorption band of water at 3 μm. However, the laser characteristics of 2:7 μm due to the 4 I 11=2 → 4 I 13=2 transition are rather poor. The intrinsic difficulty to obtain laser action on this transition is mainly related to shorter fluorescence lifetime of the upper laser level 4 I 11=2 than that of the lower laser level 4 I 13=2 [3,4]. To obtain intense 2:7 μm emission, the artificial depletion of the 4 I 13=2 level is required, which can be achieved by suitable codoping of rare-earth ions and utilizing the energy transfer between levels of the respective ions having equal or close energies [5]. It has been reported that Tm 3þ ions can deplete the Er 3þ : 4 I 13=2 level to obtain 2:7 μm emission in GeGaAsS glass using a titanium-sapphire tunable laser as an excitation source, which can be attributed to the energy transfer between the Tm 3þ : 3 F 4 and Er 3þ : 4 I 13=2 levels [4]. As is shown in Fig. 1 Additionally, Ho 3þ lasers are also well suited for mid-IR range-finding, atmospheric monitoring, and sensing applications because their 2:0 μm emissions are within an atmospheric transparency window [6,7]. To enhance pump absorption, Ho 3þ -doped glasses have been sensitized with either Tm 3þ , Yb 3þ , or Er 3þ [8,9]. Nevertheless, there are few reports about the 2:0 μm emission in Er 3þ =Tm 3þ =Ho 3þ -doped glass [10].In order to get powerful mid-IR emissions from Er 3þ =Tm 3þ =Ho 3þ -doped glass, the host glass is as important as the choice of rare-earth ions. Regarding the emission at 2:7 μm, most research has focused on Er 3þ -doped fluoride and chalcogenide glasses [11][12][13]. Fluorophosphate (FP) glasses combine significant advantages of the fluoride and phosphate glass, and own a less complex fabrication route than that of fluoride and chalcogenide glasses [14]. They are characterized by good moisture resistance, high solubility for rare-earth ions, and broad absorption and emission bands [15,16]. In particular, FP glasses appear interesting for high power solid state lasers due to their low nonlinear refractive index, which will minimize associated phenomena such as self-focusing and self-phase modulation in high power lasers and ensure the highest possible laser i...

show abstract

mentioning

confidence: 99%

Intense 27 μm and broadband 20 μm emission from diode-pumped Er^3+/Tm^3+/Ho^3+-doped fluorophosphate glass

Tian

et al. 2011

Opt. Lett.

View full text Add to dashboard Cite

show abstract

“…Fluorophosphate glasses have received great attention and are the subject of intense research mainly because of their wide transmission range from the ultraviolet to the infrared regions, possible doping levels with rare earth ions exceeding 10 21 /cm 3 , low linear and non-linear refractive index, and high damage threshold as desirable for laser host materials [1,2]. The technological importance of fluorophosphate glasses make it in increasing demand for the development of new glasses with specific characteristics.…”

Section: Introductionmentioning

confidence: 99%

Structure and thermal stability of novel fluorophosphate glasses

Sun

Zhang

et al. 2005

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…Regarding the 2.9 μm emission by Dy 3 + ions, up to now, the hosts are mainly limited to the fluoride and chalcogenide glasses [4,5]. Fluorophosphate (FP) glasses combine the favorable properties from both the fluoride and phosphate glasses, i.e., good moisture resistance, high solubility for rare earth ions, broad absorption and emission bands, and own a less complex fabrication route than that of fluoride and chalcogenide glasses [6,7]. Moreover, based on our prepared FP glasses doped with Tm 3 + , Ho 3 + or Er 3 + , the 2 μm and 2.7 μm spectroscopic properties have already been investigated and show potential applications for mid-infrared laser media [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and infrared photoluminescence around 2.9μm from Dy3+/Tm3+ codoped fluorophosphate glass

Tian

et al. 2012

Materials Letters

View full text Add to dashboard Cite

Tailoring the nonlinear refractive index of fluoride-phosphate glasses for laser applications

Cited by 56 publications

References 1 publication

Intense 27 μm and broadband 20 μm emission from diode-pumped Er^3+/Tm^3+/Ho^3+-doped fluorophosphate glass

Intense 27 μm and broadband 20 μm emission from diode-pumped Er^3+/Tm^3+/Ho^3+-doped fluorophosphate glass

Structure and thermal stability of novel fluorophosphate glasses

Synthesis and infrared photoluminescence around 2.9μm from Dy3+/Tm3+ codoped fluorophosphate glass

Contact Info

Product

Resources

About