Er3+, Yb3+ co-doped phosphate glass is a well-known and commonly used active medium for lasers emitting in the "eye-safe" spectral range of 1,5-1,6 µm.
As an eye-safe wavelength laser, 1540nm lasers have used in ranging finder, radar, target recognition. Er3+/Yb3+ co-doped phosphate glass cooperate with passive Q-Switch crystal cospinel can get 1540nm pulse solid-state laser.
Optical and laser properties of Er:Yb:glass| Cross section for stimulated emission (10-20cm2) | 0.8 | | Fluorescent lifetime (ms) | 7.7-8.0 | | Center lasing wavelength (nm) | 1535 | | Refractive index (1535nm) | 1.524 | | Refractive index (d 589.3nm) | 1.532 | | Abbe value | 66 | | dn/dT (10-6/ºC) (20~100ºC) | -1.72 | | Transformation temp. (ºC) | 556 | | Softening temp. (ºC) | 605 | | Coeff.of linear thermal expansion (10-7/K) (20~100ºC) | 87 | | Coeff.of linear thermal expansion (10-7/K) (100~300ºC) | 95 | | Thermal Coeff.of optical path length (10-6/K) (20~100ºC) | 2.9 | | Thermal conductivity (25ºC) (W/mK) | 0.7 | | Density (g/cm3) | 3.06 | Chemical durability
(weigh loss rate at 100ºC distilled water) (μg/hr.cm2) | 52 |
OPTU offers Er:Yb:glass specifications:| | | | Dimension Tolerances: | rods with diameter: +0.0/-0.05 mm , Length: ±0.1 mm | | Surface Quality: | 10/5 Scratch/Dig MIL-O-1380A | | Parallelism: | < 10″ | | Perpendicularity: | < 5′ | | Clear Aperture: | > 90% | | Wavefront Distortion: | λ/4 per inch @ 632.8 nm | | Surface Flatness: | < λ/8 @ 632.8 nm | | Chamfer: | < 0.1 mm @ 45o | | Barrel Finish | 50-80 micro-inch (RMS) , | | Size | Upon customer request | | Coating | AR/HR oating upon customer's request | | Damage Threshold | 750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz | | Quality Warranty Period | One year under proper use |
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