LIEKKI active fibers are available with either Ytterbium (Yb) or Erbium (Er) as the main dopant. 

Yb doped fibers are available over a range of dopant concentration levels ranging from Yb700 to Yb1200. The Yb number refers to the nominal small signal absorption of the core at the 976nm peak wavelength in dB/m. Yb fibers are available for single-clad core pumping applications as well as double clad cladding pumping applications over a broad core diameter range. Yb fibers are available both as PM and non-PM variants as standard products. 

產品型號：

型號	市場	纖芯直徑	光纖摻雜
LIEKKI™ Yb1200-4/125	Fiber Laser Solutions	4um / 125	Yb - 1200
LIEKKI™ Yb700-6/125-PM	Fiber Laser Solutions	6um / 125	Yb - 700
LIEKKI™ Yb1200-6/125	Fiber Laser Solutions	6um / 125	Yb - 1200
LIEKKI™ Yb1200-10/125	Fiber Laser Solutions	10um / 125	Yb - 1200
LIEKKI™ Yb1200-12/125	Fiber Laser Solutions	12um / 125	Yb - 1200
LIEKKI™ Yb1200-12/250	Fiber Laser Solutions	12um / 250	Yb - 1200
LIEKKI™ Yb700-20/125	Fiber Laser Solutions	20um / 125	Yb - 700
LIEKKI™ Yb800-20/400	Fiber Laser Solutions	20um / 400	Yb - 800
LIEKKI™ Yb1200-20/125	Fiber Laser Solutions	20um / 125	Yb - 1200
LIEKKI™ Yb1200-20/400	Fiber Laser Solutions	20um / 400	Yb - 1200
LIEKKI™ Yb700-25/250	Fiber Laser Solutions	25um / 250	Yb - 700
LIEKKI™ Yb1200-25/250	Fiber Laser Solutions	25um / 250	Yb - 1200
LIEKKI™Yb700-30/250	Fiber Laser Solutions	30um / 250	Yb - 700
LIEKKI™ Yb1200-30/250	Fiber Laser Solutions	30um / 250	Yb - 1200