PM Combiner

The PM Combiner enables the efficient combination of two orthogonally polarised sources of light such that they are output through the same, single fibre output.

In optical amplifiers this provides a doubling of pump power whilst ensuring pump redundancy should a pump failure occur.

Applications include high power optical amplifiers and undersea systems. All ports consist of polarisation maintaining fibre.

Key Features:

• Low insertion loss
• High power handling
• 9xx, 10xx, 14xx and 15xx variants

Applications:

• Erbium doped fibre amplifiers (EDFAs)
• Raman amplifiers
• Undersea systems
• Coherent optical communications

Optical Specifications

1. The centre wavelength may be selected from within the operating wavelength ranges supplied.
2. Other wavelengths are available. Please contact the sales office.
3. Insertion loss at centre wavelength (not including TDL or connector losses).

Configuration

Ordering Code Information

Example: FFP-SM3245F10 (PM Combiner, Grade M, regular housing, 2x2, channel centre = 1445nm,

telecoms PM fibre 250μm buffer, 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. Insertion loss in specification table does not include connector loss. Other connectors available on request.

Multimode Power Combiner with PM Signal Feedthrough

Our TFB series Power Combiners provide a high efficiency means of combining light from several multimode sources into one fibre.

Our proprietary manufacturing techniques allow the precise fusion of input fibres around a central PM polarisation maintaining) signal feedthrough fibre and a PM dual clad output fibre providing high coupling efficiency over a wide pump wavelength range.

Available in standard 3x1 and 7x1configurations, our power combiners can be fabricated from a range of industry standard multimode fibres allowing ease of splicing to commercially available laser diodes.

Available in a standard (6+1)x1 configuration, the combiner can be fabricated from a range of industry standard fibres for ease of splicing to commercially available laser diodes and fibre applications.

Custom options cover large mode area (LMA) signal feedthrough fibres, dual clad output fibres and port count / configurations and are available on request.

Custom variants using non-standard fibres are available on request.

Key Features:

• All fibre construction1.5μm & 1.0μm PM Signal fibres available
• High power design
• High Coupling Efficiency
• PM Axis maintained
• Custom configurations available

Applications:

• Cladding pumped fibre lasers
• Cladding pumped fibre amplifiers
• Telecoms
• Medical
• Industrial
• Defence

Optical Specifications

1. All specifications are for operation at room temperature.
2. MM Transmission efficiencies based on typical system mode fill conditions and 0.5m pigtails. Reported at 975nm as standard.
3. Signal (feedthrough) transmission efficiency reported at centre wavelength; specification typical for centre wavelength ±15nm (minimum).

Ordering Code Information

Example: TFB-P50611B30 (6+1x1 Tapered Fibre Bundle with PM 1550nm Signal feedthrough, six 105/125um, 0.15NA pump inputs, 1550nm core DCF Output in regular housing with 0.5m pigtails).

1. Signal wavelengths of 1064nm or 1550nm assume the use of Nufern PM-980-HP and PM-1550-HP (or equivalent) signal feedthrough fibres respectively.
2. Typical mode field diameters are based on ~7.5um for 1064nm and ~10.5um for 1550nm. Fibres are passive.
3. Maximum housing lengths shown. Adequate heat sinking is required for high power operation. For more information please contact the G&H sales team.
4. Minimum pigtail lengths.

Visible Wavelength Combiner

Our Visible Wavelength Combiners are singlemode optical fibre components and modules. They enable any two or three primary colours in the visible wavelength region to be combined or separated.

Designed for applications in display systems, sensors and biomedical equipment, the combiners utilise our 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.

Combiners are available for either 2 or 3 wavelengths: 2 wavelength combiners combine red/green, blue/green or red/blue. 3 wavelength combiners provide full RGB operation; enabling full colour displays.

All variants are available on a custom basis, so please contact us to discuss your specific requirements.

Key Features:

• 2 or 3 colour combining or separating
• All fibre – no lens alignment
• No unwanted reflections
• Low light loss
• High power handling
• Custom Product

Applications:

• Visible and display systems
• Sensors
• Biomedical equipment
• Research
• Two Wavelength Combiner