ULTRA-LOW RATIO TAP COUPLER
Fused Fiber Coupler
The ultra-low ratio tap coupler splits a very small amount of light from a signal path to a tap port.
Suitable for very high optical power, its main application is in the monitoring of optical sources such as fiber lasers.
Low tap ratios such as 0.1%, 0.01% or 0.001% enable the monitoring photodetector to operate without damage or saturation.
Gooch & Housego proprietary manufacturing technology provides ultra-low loss in the signal path, thereby maximising optical power handling. Consistently high return loss (>55 dB) reduces the amount of optical power reflected back along the input fiber.
This helps the fiber laser operate in a stable manner.
Standard parts are available for wavelengths from 700 – 1599 nm. For other wavelengths, coupling ratios or customized fiber types please contact the sales office.
Key Features
• Tap ratio up to 50 dB
• High return loss
• Ultra-low signal insertion loss
• High power handling
• Available at wide variety of laser wavelengths
• Custom product
Applications
• Fiber lasers
• RAMAN amplifiers
• High power EDFA
Specifications
Parameter
Specification
Coupling ratio
0.1%
0.01%
0.001%
Tap insertion loss
30 ±3 dB
40 ±4 dB
50 ±5 dB
Signal insertion loss1,2
0.1 dB
Return loss
≥55 dB
Operating wavelength3
Any selected wavelength from 700 to 1599 nm
Optical power handling5, 6
4 W
Housing type codes
3, 4, 5, 7 & C
Operating temperature
-40 – +75°C
Storage temperature
-40 – +85°C
Pigtail tensile load
5 N
Fiber type4
Single mode
1 Maximum insertion loss at operating wavelength. Not including TDL or PDL.
2 In 2x2 couplers insertion loss is not specified for launch through second input port P4 (coloured blue).
3 Other wavelengths available as custom components. Please contact the G&H sales team.
4 For customized fiber types please contact the G&H sales team.
5 For operation at powers of greater than 4 W the component housing and fiber must be adequately heat-sunk (for additional information contact G&H sales). Components intended for high power operation are only available in the 2x2 configuration. Component performance and reliability under high power must be determined within the customer system.
6 The performance and reliability of optical connectors is not guaranteed for optical powers of greater than 1 W.
7 For connectorized component, operating temperature range is –5 – +75o C.
Housing Options
Housing Code
Description
Dimensions (mm)
Pigtail
3
Regular
3.0
(∅) x
50 (L)
Primary-coated fiber
4
Semi-ruggedized slim
3.0
(∅) x
60 (L)
∅0.9 mm loose-tube
5
Semi-ruggedized
5.0
(∅) x
75 (L)
∅0.9 mm loose-tube
7
High power
5 (W) x 5
(H) x 85 (L max)
Primary-coated fiber
C
Regular high power
3.0
(∅) x
50 (L)
Primary-coated fiber
Configuration
Order code
Order codes are comprised of a standard device prefix (e.g. FFS) followed by code letters or numbers which correspond to available options.
Sample: FFS-550N72A10 (1550 nm center channel wavelength, 0.01% tap coupling ratio, high power housing, 2x2 port configuration, A grade, 1 m pigtail length, no connectors).
1 Minimum pigtail length. Further pigtail lengths available on request. Where connectorized, pigtail length is to connector end face.
2 Connectors may be fitted to housing types 4 and 5. For connectorization of other housing types contact G&H sales. Note that insertion loss stated does not include connector losses.
5 7 & C not available as 1x2 configuration.
商品属性 [波长] 700 - 1600 nm