LIEKKI Optical Fibers nlight s LIEKKI active fibers unite highest absorption with lowest photodarkening levels tailored for applications ranging from low-power amplifiers to kw fiber lasers. Available with either (Yb) or Erbium (Er) as the main dopant, LIEKKI active fibers are offered over a range of dopant concentration levels, for single-clad core or double clad cladding pumping applications and with a wide selection of core diameters. Both PM as well as non-pm variants are available as standard products with Yb doping. Passive fibers designed to match our active fibers complement nlight s extensive fiber product list. Features LIEKKI active fibers build on nlight s proprietary fiber deposition process for industry leading performance and reliability. LIEKKI fibers are designed and manufactured to meet custom high-performance and high-reliability requirements for CW, quasi-cw and short-pulsed fiber laser and amplifier applications extending from the low to the high power regime. Applications Industry leading fiber deposition process Direct Nanoparticle Deposition Highest absorption Lowest photodarkening Low background loss Excellent beam quality proven in up to kw single mode fiber lasers Matching active and passive fiber designs Small and high power amplifiers CW and quasi-cw fiber lasers Pulsed fiber lasers and amplifiers
LIEKKI Doped Fibers Core diameter [MFD at 1060 nm] m [4.4 ± 0.8] [6 ± 0.8] 10 ± 1.0 12.5 ± 1.0 20 ± 1.5 Cladding absorption at 920 nm [Peak core absorption at 920 nm] db/m [280 ± 50] 0.6 ± 0.2 1.8 ± 0.4 2.6 ± 0.7 4.0 ± 0.5 6.0 ± 0.9 Core NA [nominal core NA] [0.2] 0.150 ± 0.01 0.080 ± 0.005 Core background loss at 1200 nm, db/km - 15 25 Dual coated high index acrylate 4/125 6/125DC 10/125DC 12/125DC 20/125DC 20/125DC Cladding diameter m 250 ± 10 Core diameter m 12.5 ± 1.0 25 ± 1.5 30 ± 2.0 Cladding absorption at 920 nm db/m 0.6 ± 0.1 1.5 ± 0.2 2.3 ± 0.3 2.2 ± 0.3 3.3 ± 0.6 Core NA 0.080 ± 0.005 0.070 ± 0.005 Cladding NA, 0.48 Core background loss at 1200 nm, db/km 15 25 12/250DC 25/250DC 25/250DC 30/250DC 30/250DC Cladding diameter m 400 ± 10 Core diameter [MFD at 1060 nm] m 20 ± 1.5 Cladding absorption at 920 nm db/m 0.5 ± 0.1 0.7 ± 0.2 Core NA 0.068 ± 0.005 0.070 ± 0.005 Cladding NA, 0.48 Core background loss at 1200 nm, db/km 15 Yb800-20/400DC 20/400DC Matching passive fibers to all active fibers available. For customer specific fibers please contact nlight s sales representative.
LIEKKI Doped Polarization Maintaining Fibers Core diameter [MFD at 1060 nm] m [6 ± 0.8] [6 ± 0.8] 10 ± 1.0 12.5 ± 1.0 20 ± 1.5 Cladding absorption at 920 nm [Peak core absorption at 920 nm] db/m [175 ± 25] 0.6 ± 0.2 1.8 ± 0.4 2.6 ± 0.7 6.5 ± 1.1 Core NA 0.150 ± 0.01 0.080 ± 0.005 Birefringence, 1E-04 2.0 1.4 1.6 0.8 Core background loss at 1200 nm, db/km 25 15 25 Dual coated high index acrylate 6/125-PM 6/125DC-PM 10/125DC-PM 12/125DC-PM 20/125DC-PM Cladding diameter m 250 ± 10 400 ± 15 Core diameter m 25 ± 1.5 30 ± 2.0 20 ± 1.5 Cladding absorption at 920 nm db/m 1.6 ± 0.2 2.4 ± 0.5 2.2 ± 0.3 3.4 ± 0.6 0.7 ± 0.2 Core NA 0.070 ± 0.005 Cladding NA, 0.48 Birefringence, 1E-04 1.4 1.6 1.4 1.6 Core background loss at 1200 nm, db/km 25 15 25/250DC-PM 25/250DC-PM 30/250DC-PM 30/250DC-PM 20/400DC-PM Matching passive fibers to all active fibers available. For customer specific fibers please contact nlight s sales representative.
LIEKKI Erbium Doped Fibers Mode field diameter for LP01 at 1550 nm m 6.5 ± 0.5 9.5 ± 0.8 Erbium Peak core absorption at 1530 nm db/m 30 ± 3 40 ± 4 110 ± 10 16 ± 3 80 ± 8 Core NA, nominal 0.2 0.13 Cut-off wavelength nm 890 ± 90 1200 ± 200 890 ± 90 1250 ± 150 Er30-4/125 Er30-4/125HC Er40-4/125 Er110-4/125 Er16-8/125 Er80-8/125 Matching passive fibers to all active fibers available. For customer specific fibers please contact nlight s sales representative.
LIEKKI Matching Passive Fibers (1/3) Mode field diameter for LP01 at 1060 nm m 6 ± 0.5 Core NA 0.150 ± 0.005 Birefringence, 1E-04 - - 2.0 Dual coated high index acrylate 6/125 6/125DC 6/125DC-PM Core diameter m 10 ± 1.0 Core NA 0.080 ± 0.005 Birefringence, 1E-04-1.4-1.4 10/125 10/125-PM 10/125DC 10/125DC-PM Core diameter m 12.5 ± 1.0 Core NA 0.080 ± 0.005 Birefringence, 1E-04-1.6-1.6 12/125 12/125-PM 12/125DC 12/125DC-PM
LIEKKI Matching Passive Fibers (2/3) Core diameter m 20 ± 1.5 Core NA 0.080 ± 0.005 Birefringence, 1E-04-0.8-0.8 20/125 20/125-PM 20/125DC 20/125DC-PM Cladding diameter m 250 ± 5 Core diameter m 12.5 ± 1.0 20.0 ± 1.5 Core NA 0.080 ± 0.005 Birefringence, 1E-04 - Dual coated high index acrylate 12/250 12/250DC 20/250DC Cladding diameter m 250 ± 5 Core diameter m 25 ± 1.5 Core NA 0.070 ± 0.005 Birefringence, 1E-04-1.6-1.6 25/250 25/250-PM 25/250DC 25/250DC-PM
LIEKKI Matching Passive Fibers (3/3) Cladding diameter m 250 ± 5 Core diameter m 30 ± 2.0 Core NA 0.070 ± 0.005 Birefringence, 1E-04-1.6-1.6 30/250 30/250-PM 30/250DC 30/250DC-PM Cladding diameter m 400 ± 5 Core diameter m 20 ± 1.5 Core NA 0.070 ± 0.005 0.068 ± 0.005 0.070 ± 0.005 Birefringence, 1E-04-1.6-1.6 reliability proven) 20/400 20/400-PM 20/400DC 20/400DC-PM
LIEKKI Multimoded and Coreless Passive Fibers Cladding diameter m 125 ± 3 220 ± 5 480 ± 9 Core diameter m 105 ± 3 200 ± 4 400 ± 8 Core NA 0.160 ± 0.01 0.230 ± 0.01 0.160 ± 0.01 0.230 ± 0.01 - Dual coated low index acrylate Dual coated high 105/125 200/220 200/220DC 400/480DC Cladding diameter m 125 ± 3 250 ± 5 400 ± 8 480 ± 9 Cladding NA, 0.48 125DC 250DC 400DC 480DC