Phosphate-core silica-clad Er/Yb-doped optical fiber and cladding pumped laser

Abstract

We present a composite optical fiber with a Er/Yb co-doped phosphate-glass core in a silica glass cladding as well as cladding pumped laser. The fabrication process, optical properties, and lasing parameters are described. The slope efficiency under 980 nm cladding pumping reached 39% with respect to the absorbed pump power and 28% with respect to the coupled pump power. Due to high doping level of the phosphate core optimal length was several times shorter than that of silica core fibers.

Praseodymium ion doped phosphate glasses for integrated broadband ion-exchanged waveguide amplifier

“…In glass hosts, phosphate glasses have been demonstrated to be a favorable material for optical lasers and amplifiers owing to their good thermal stability, excellent mechanical strength and outstanding ion-exchangeability [50][51][52][53][54][55][56][57]. With the addition of Al 2 O 3 , the chemical and thermal stability of phosphate glasses will be further improved for special requirements in wet chemical etching and ion-exchange process during waveguide fabrication [58][59][60][61].…”

High-aluminum phosphate glasses for single-mode waveguide-typed red light source

“…Other reported sodium aluminum phosphate glasses including MM-1 [27], NMAP [48], and NAP glasses [16], are also marked in the ternary phase diagram of Na 2 O-Al 2 O 3 -P 2 O 5 glass system. In the previous work, single-mode K + -Na + ionexchanged Er 3+ /Yb 3+ codoped NMAP glass channel waveguide operating in NIR region has been fabricated [55], and the mode field diameter was measured to be 6.8 μm in the horizontal direction and 6.4 μm in the vertical direction when coupling with a 1.53 μm laser, as shown in the inserted picture of Fig.…”

“…The trivalent rare-earth ions incorporated phosphate glasses are a promising candidate to develop optical devices because of their significant properties, i.e., high thermal expansion coefficient, ultraviolet transmission, suitable refractive index, less dispersion and low melting temperature. Moreover, phosphate glasses represent high rareearth ions solubility, good chemical stability and excellent ion exchangeability, which allow high concentration doping without significant non-radiative relaxation and are attractive to fabricate high efficiency waveguides that can meet the demand of highpower and compact laser cavity [10][11][12][13][14][15][16][17][18][19]. With the addition of Al 2 O 3 , the thermal and chemical stability of phosphate glasses will be largely improved [20][21][22][23][24][25] for stable requirements in wet chemical etching and ion-exchange process during waveguide fabrication.…”

Up-conversion losses in different erbium-doped laser glasses

“…Looking from the technological point of view, a very interesting feature of the alumino-boro-phosphate glass composition is its compatibility with fused silica that allows fabricating composite fiber waveguides with phosphate core in a 5 The dependence of the product α × n 0 versus initial concentration of excited Er ions (n 0 ). Curve numbers correspond to glass compositions numbers silica cladding [11]. Thus, the properties of this glass allow to make a short-length amplifying fibers that can be easily spliced with standard silica fiber components.…”