1.Product description

The specification is specially for EFC8-Q product, it's a water-direct(WD) cooling structurer, Lasfiberio has another water-indirect(WID) cooling structurer as optional, the WD structurer has a better cooling effect but has requirement for water quality compare to WID one.
At the input and output fiber end face in high power (hundreds, thousands even dozens of thousand watts) laser, the energy density can be very high . So if the laser radiation transmits to the fiber end face, there is high risk of fiber burning or degradation.
A endcap at the end face of fiber is a good solution for above issue - an 8mm diameter endcap spliced to the fiber can greatly increase the diameter of the beam spot, which is a very effective method to lower the power density.
On the surface of the endcap, a high damage threshold AR coating is coated, while on the other side of the fiber, a high efficient cladding power stripper (CPS) is added, most important it's epoxy-free.

2. Features

⊙ Fiber spliced to 8mm end cap, passed proof test & vibration test.

⊙ A cladding power stripper (CPS) is made near the end cap, featured in high stripping efficiency, low loss in fiber core, epoxy free.

⊙ Safety interlock.

⊙ High damage threshold AR coating on the surface of end cap can decrease transmission loss.

⊙ Compatible interface: QBH,  LLK-Q,  HLC-8/LC-8

3.Applications

⊙ Output of fiber Laser

⊙ Solid state Laser and fiber coupled diode Laser

⊙ Accessories of Laser machine

4.Specifications

Optical parameters		Specifications
Operating wavelength range		900-1100nm
Transmit efficiency		>98% (typical >99%)
Cladding power stripper		Stripping efficiency>20dB, Epoxy-free.
AR coating		Reflection rate at all wavelength range<0.2%
Fiber type	LMA DC fiber	x/125DCF, x/200DCF, x/250DCF, x/400DCF etc, cladding dia. up to 600u max
	BD fiber	50/360, 100/360, 200/360, 300/500, 400/440, 600/660, 800/880 0.22NA etc. The fiber core dia. up to 1.5mm, cladding dia. up to 2mm
Mean handling power		Upto 5kW For higher power, not verified so far
Back reflection		≤ 150W (CW) Due to the limitation of water cooling cavity structure, CPS can handle >500W cladding power.
Fiber concentricity		≤ 50um
Mechanical parameters		Specifications
Single/Double connectors		Single (can be used for input or output) or double connectors
Cooling water volumn		≥1.7L/min
Water quality		Distilled water, Deionized water or Drinkable water
Cooling water tube connector		MS-5H-6, tube spec(OD6mm, ID4mm)
Cable configuration		OD. 13mm (with yellow PVC)， with inner Teflon tube(OD6mm,ID4mm)
Cable length		Armored calbe lengths 5m，10m，15m，20m etc. (can be customized)
Accessories for single connector version only
A01		bare fiber length: 1.0-1.5m
A02		500mm Interlock wires outside of the armored cable
A03		With M20 gland to mount on laser box (Panel wall size<Φ20x6mm)

5.CPS performance

⊙ Input 150 watts of pump power, through CPS, get <1W output power, the EFC8-Q temperature is 36 ℃

⊙ Higher stripping power can be customized according to customer requirements

Fig 1: optical path

6.AR Coating

Fig 2: Coating curve

7.Schematics

Fig 3: Scheme of EFC8-Q before assembly Fig 4: EFC8-Q

Fig5: Drawing of EFC8-Q head

Fig 6: Difination of single head cable length

Fig 7: Safety interlock circuit diagram for double head EFC8-Q

8. Order information

EFC8 - - - -

A	B	C	D
Type	Configuration	Fiber Code	Fiber length 05=5m 10=10m 15=15m XX=customized
Q=Water cooling	SI=Single input	Find details in Fiber code list	05=5m
	SO=Single output		10=10m
	DB=Double heads		15=15m
	Fiber code list		XX=customized

9. Fiber code list

Fiber type		Code
Double Cladding Fiber	20/400 DCF	LD420
	25/400 DCF	LD425
	30/400 DCF	LD430
	30/600 DCF	LD630
Beam Delivery Fiber	200/240 0.22NA	B220
	50/120/360 0.22NA	B305
	50/70/360 0.22NA	B306
	100/360 0.22NA	B310
	200/360 0.22NA	B320
	300/360 0.22NA	B330
	200/500 0.22NA	B520

For the fiber not listed above, please ask sales.

PN example:EFC8-Q-DB-B310-10

remark:

We reserve the right to amend the specification without any prior notification. If there is any change, please refer to the real document then.