The Near Infrared Coupler splits light at any selected wavelength from 700nm to 1150nm. Designed for applications in fibre laser, sensor and avionics applications, the coupler utilizes G&H’s low loss fused fibre technology. No light leaves the fibre and therefore no alignment is required; and there are no unwanted reflections. Furthermore the output fibre pigtails may be directly integrated into beam delivery systems.  For components and modules which combine different wavelengths within the near infrared

region please refer to the datasheet ‘Near Infrared WDM’.

Key Features:

700 to 1150nm operation

Any coupling ratio available

All fibre – no alignment required

No unwanted reflections

Low light loss

High power handling

Applications:

Fibre lasers

Sensors

Avionics

Biomedical equipment

Research

Optical Specifications

1. In 2x2 couplers insertion loss is not specified for launch through second input port P4 (coloured blue)

2. Maximum insertion loss at operating wavelength. Not including TDL, PDL or connector losses.

3. Any coupling ratio available. Please contact us for specifications of coupling ratios not listed.

1. For connectorised component, operating temperature range is –5 to +75^oC.

Housing Option

Configuration

Ordering Code Information

1. FFS-780K31A10 (Fused Fibre Speciality Coupler, 780nm, 50/50 coupling ratio, regular housing, 1x2, A grade, 1m pigtails, no connectors)

2. FFS-060K31A10 (Fused Fibre Speciality Coupler, 1060nm, 50/50 coupling ratio, regular housing, 1x2, A grade, 1m pigtails, no connectors)

1. Minimum pigtail length. Further pigtail lengths available on request. Where connectorised, pigtail length is to connector end face.

2. Insertion Loss in specification table does not include connector losses.

3. Any coupling ratio available. Please contact G&H for ordering codes of coupling ratios not listed.

4. LC connector not available for housing code 6, fully ruggedised housing.

5. Connectors may be fitted to housing types 4, 5 and 6. For connectorisation of housing type 3 please contact the sales office.

The G&H PM Coupler enables the accurate monitoring and splitting of optical signals in polarisation maintaining fibre. Manufactured using industry-standard PM fibre, the PM Coupler is available in any coupling ratio from 1% to 50%. Based on G&H’s fused fibre technology, the PM Coupler demonstrates very low loss, high power handling and there is no price penalty for adding a second input port. The centre operating wavelength may be chosen from within a wide variety of operating passbands, including 980, 1064, 1310, 14xx, 15xx and 16xx.

In common with all PM components, it is necessary to launch into either the slow or the fast axis to maintain polarisation. For the G&H PM Coupler, specifications are based on slow axis launch, although fast axis versions are also available if requested.

Key Features:

All PM fibre construction

Low excess loss

High power handling

980, 1064, C, L and S bands available

Slow axis operation as standard

Fast axis operation also available

Applications:

Power monitoring of PM sources

Coherent communications

Fibre gyroscopes

High power fibre lasers

Fibre amplifiers

Optical Specifications¹

1. All specifications are for operation at room temperature.

2. The centre wavelength may be selected from within the available wavelength ranges supplied.

3. Defined for signal path P1-P2.

4. Defined for both signal path P1-P2 and tap path P1-P3.

5. Preliminary specifications.

Configuration

Ordering Code Information

Example: FFP-CK3250A10 (C band, PM Coupler, 50/50 coupling ratio, regular housing, 2x2, channel centre =1550nm, grade A, 1m pigtail, no connector)

1. Channel centre must be within the wavelength ranges shown in the Optical Specifications table.

2. Minimum pigtail length. Other pigtail lengths are available on request.

3. Optical specifications in specification table do not include connector loss. Other connectors available on request.

4. Other coupling ratios available on request.

5. PM Products are manufactured using 250μm PANDA PM fibre, 400μm PANDA PM fibre available at wavelengths higher than 1400nm.

The G&H Fused PM LRT, taps off low power from a signal path whilst maintaining polarisation through the component. G&H proprietary PM manufacturing technology provides tap ratios as low as 0.01% with ultra low loss and high polarisation extinction ratio. The all fibre construction and excellent loss characteristics provide exceptional reliability at high powers. PM LRT’s also exhibit improved tap ratio stability when input polarisation extinction ratio levels are low or fluctuating.

These high performance parts are available at a range of wavelengths with different fibre options. PM LRTs can therefore be readily specified in a wide variety of applications, enabling rapid design cycles and new project builds.

Standard parts are available at wavelengths from 900 – 1600nm. For other wavelengths or coupling ratios please contact the sales office.

Key Features:

Low Loss

High PER

High power handling

PM PANDA Fibre on all ports

Applications:

Fibre lasers

Instrumentation

Optical Specifications

1. Insertion Loss at operating wavelength. Not including TDL.

2. Devices manufactured to operate in fast axis as standard. For use in a slow-axis system a 90° PM splice is required.

3. Specifications shown are for operation at room temperature.

4. The centre wavelength may be selected from within the available wavelength range supplied.

Configuration

Ordering Code Information

Sample: FPU-060N31A10 (Fused Fibre LRT, 1060nm, 0.01% tap, Regular housing, 1x2, Grade A, 1m pigtails, No connectors)

PM Products are manufactured using 250μm PANDA PM fibre, 400μm PANDA PM fibre available at wavelengths higher than 1400nm.

The Ultra Low Ratio Tap Coupler splits a very small amount of light from a signal path to a tap port. Tested at up to 50W optical power, it’s main application is in the monitoring of very high power optical sources such as fibre lasers. Low tap ratios such as 0.1%, 0.01% or 0.001% enable the monitoring photodetector to operate without damage or saturation.

G&H proprietary manufacturing technology provides ultra-low loss in the signal path, thereby maximising optical power handling. Consistently high return loss (>55dB) reduces the amount of optical power reflected back along the input fibre. This helps the fibre laser operate in a stable manner.

Standard parts are available for wavelengths from 700 to 1599nm. For other wavelengths, coupling ratios or customised fibre types please contact the sales office.

Key Features:

Tap ratio up to 40dB

High return loss

Ultra-low signal insertion loss

High power handling

Available at wide variety of laser wavelengths

Custom product

Applications:

Fibre Lasers

RAMAN amplifiers

High Power EDFA

Specifications

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 sales office.

4. For customised fibre types please contact the sales office.

Configuration

Ordering Code

Examples:

1.        FFS-080 P32 A10 (Fused Fibre Speciality Coupler, 1080nm, 0.001% coupling ratio, regular housing, 2x2, A grade, 1m pigtails, no connectors)

2.        FFS-550 M32 A10 (Fused Fibre Speciality Coupler, 1550nm, 0.1% coupling ratio, regular housing, 2x2, A grade, 1m pigtails, no connectors)

1. Minimum pigtail length. Further pigtail lengths available on request.

The Visible Wavelength Coupler splits or combines light in the visible region. Versions optimised for any wavelength within the range 450nm to 700nm may be selected.

Designed for applications in display systems, sensors and biomedical equipment, the coupler utilises G&H’s low loss fused fibre technology.

No light leaves the fibre and therefore no alignment is required; and there are no unwanted reflections. Furthermore the output fibre pigtails may be directly integrated into beam delivery systems.

For components and modules which combine different wavelengths within the visible region please refer to the datasheet ‘Visible Wavelength Combiners’.

Key Features:

Visible wavelength operation

Any coupling ratio available

All fibre – no lens alignment

No unwanted reflections

Low light loss

High power handling

Applications:

Visible and display systems

Sensors

Biomedical equipment

Research

Optical Specifications

1. In 2x2 couplers performance is not specified for launch through second input port P4 (coloured blue)

2. Includes fibre losses for up to 1m pigtail length. Does not include connector losses.

3. Any coupling ratio available. Please contact us for specifications of coupling ratios not listed.

1. For connectorised component, operating temperature range is –5 to +75^oC.

Housing Option

Configuration¹

1. 1x2 couplers for blue wavelengths i.e. <500nm are supplied as a 2x2 with an external termination on port P4.

Ordering Code Information

Example:

FFS-G32K31A10 (Fused Fibre Speciality Coupler, 532nm, 50/50 coupling ratio, regular housing, 1x2, A

grade, 1m pigtails, no connectors)

1.   Minimum pigtail length. Further pigtail lengths available on request. Where connectorised, pigtail length is to connector end face.

2.   Excess Loss in specification table does not include connector losses.

3.   1x2 couplers for blue wavelengths i.e. <500nm are supplied as a 2x2 with an external termination on port P4.

4.   Any coupling ratio available. Please contact G&H for ordering codes of coupling ratios not listed.

5.   LC connector not available for housing code 6, fully ruggedised housing.

6.   Connectors may be fitted to housing types 4, 5 and 6. For connectorisation of housing type 3 please contact the sales office.