Precision Dual Fiber Pigtail
Precision Dual Fiber Pigtail
BYNET Precision Dual Fiber Pigtails are designed for optical assemblies requiring two optical fibers with controlled spacing. Multiple fiber spacing options are available in the reference product series, supporting different fiber positioning and integration requirements in micro-optical components.
With reference fiber spacing values ranging from 0.133 mm to 0.255 mm, these dual fiber pigtails can be evaluated for optical coupling assemblies, fiber collimators, optical sensing systems, and custom photonics packaging.
Precision Dual Fiber Pigtail
High-Precision Dual Fiber Pigtails with Multiple Fiber Spacing Options
BYNET Precision Dual Fiber Pigtails are designed for optical assemblies requiring two optical fibers with controlled spacing. Multiple fiber spacing options are available in the reference product series, supporting different fiber positioning and integration requirements in micro-optical components.
With reference fiber spacing values ranging from 0.133 mm to 0.255 mm, these dual fiber pigtails can be evaluated for optical coupling assemblies, fiber collimators, optical sensing systems, and custom photonics packaging.

Product Overview
A precision dual fiber pigtail is an optical fiber assembly designed to maintain a specified geometric relationship between two fibers at the termination region.
Unlike conventional single fiber pigtails, a dual-fiber configuration allows two optical paths to be integrated into one compact assembly.
Fiber spacing is an important parameter in applications requiring a specific relative fiber position. The appropriate configuration depends on the optical design, fiber dimensions, assembly structure, and required positioning accuracy.
BYNET provides multiple reference spacing configurations and can review customized dual fiber pigtail requirements based on technical drawings.
Key Features
Multiple Fiber Spacing Options
Reference configurations include fiber spacing values from 0.133 mm to 0.255 mm, allowing customers to select a suitable arrangement for their optical assembly.
Dual Fiber Configuration
Two optical fibers are arranged within a compact termination structure for integration into compatible optical components.
Precision Fiber Positioning
The relative fiber positions can be specified according to the required fiber spacing and assembly geometry.
Custom Fiber Configurations
Fiber type, fiber length, termination geometry, and end-face requirements can be reviewed according to customer specifications.
OEM and Micro-Optical Integration
Designed for evaluation in custom fiber coupling assemblies, micro-optical devices, sensing components, and specialized photonics packaging.
Technical Specifications
| Parameter | Reference Specification |
|---|---|
| Product Name | Precision Dual Fiber Pigtail |
| Fiber Configuration | Dual Fiber |
| Reference Fiber Spacing | 0.133–0.255 mm |
| Spacing Options | Multiple Discrete Reference Grades |
| Fiber Spacing Tolerance | To Be Confirmed |
| Fiber Type | According to Application |
| Fiber Length | According to Customer Requirements |
| Fiber Cladding Diameter | According to Selected Fiber |
| Termination Structure | According to Approved Drawing |
| End-Face Requirements | According to Approved Drawing |
| Optical Performance Requirements | Application-Specific |
Reference Fiber Spacing Grades
The following spacing values are reproduced from existing BYNET product specifications.
| Grade | Spacing (mm) | Grade | Spacing (mm) |
|---|---|---|---|
| 1 | 0.133 | 18 | 0.210 |
| 2 | 0.143 | 19 | 0.213 |
| 3 | 0.150 | 20 | 0.220 |
| 4 | 0.158 | 21 | 0.228 |
| 5 | 0.166 | 22 | 0.233 |
| 6 | 0.175 | 23 | 0.243 |
| 7 | 0.170 | 24 | 0.250 |
| 8 | 0.180 | 25 | 0.255 |
| 9 | 0.183 | 26 | 0.178 |
| 10 | 0.138 | 27 | 0.187 |
| 11 | 0.141 | 28 | 0.195 |
| 12 | 0.144 | 29 | 0.198 |
| 13 | 0.147 | 30 | 0.205 |
| 14 | 0.153 | 31 | 0.217 |
| 15 | 0.162 | 32 | 0.224 |
| 16 | 0.191 | 33 | 0.231 |
| 17 | 0.201 | 34 | 0.236 |
Applications
Fiber Collimator Assemblies
Precision dual fiber pigtails can be used in compatible fiber collimator assemblies requiring two optical fibers with a defined relative position.
Micro-Optical Component Packaging
The dual fiber configuration supports optical assemblies requiring compact fiber placement and mechanical integration.
Optical Coupling Assemblies
Selected fiber spacing configurations can be evaluated for optical components where the relative positions of two fiber interfaces are important.
Fiber Optic Sensing Systems
Custom dual fiber pigtails can be considered for sensing assemblies requiring two optical fiber channels and application-specific termination geometry.
Photonics Research and Prototyping
Multiple reference spacing options provide flexibility for evaluating fiber arrangements in research, testing, and customized optical component development.
Fiber Spacing and Selection Guide
Fiber Spacing
Fiber spacing is a key parameter in dual fiber assemblies. The measurement reference, nominal dimension, and required tolerance should be clearly defined in the engineering drawing.
For parallel-fiber configurations, spacing is commonly specified as the center-to-center distance between the fibers, but the definition must be confirmed for the selected product.
Fiber Type
Fiber selection should consider operating wavelength, transmission mode, cladding diameter, coating dimensions, and application requirements.
Positioning Accuracy
The required spacing tolerance and relative fiber positioning accuracy should be specified according to the optical design. Actual alignment performance also depends on the termination structure and assembly method.
End-Face Requirements
End-face geometry, polishing or cleaving requirements, and fiber termination conditions should be defined according to the intended optical interface.
Optical Performance
Insertion loss, return loss, and other optical performance requirements depend on the complete optical assembly and measurement conditions.
Where specific limits are required, the test method and acceptance criteria should be agreed upon before production.
Customization and Engineering Support
BYNET can review custom precision dual-fiber pigtail requirements based on customer drawings and technical specifications.
Please provide:
- Required fiber spacing and tolerance
- Fiber type and cladding diameter
- Fiber length and coating requirements
- Required termination structure and dimensions
- End-face configuration and finish
- Operating wavelength and optical performance requirements
- Technical drawing and estimated order quantity
Manufacturing feasibility and final specifications are subject to engineering confirmation.
Frequently Asked Questions
Q1: What is a precision dual fiber pigtail?
A precision dual-fiber pigtail is an optical fiber assembly containing two fibers arranged with a specified relative position or spacing for integration into optical components.
Q2: What fiber spacing options does BYNET offer?
Existing reference specifications list multiple spacing grades ranging from 0.133 mm to 0.255 mm. Individual grades, spacing tolerances, and availability should be confirmed before ordering.
Q3: How is a precision dual fiber pigtail different from a standard fiber pigtail?
A conventional single-fiber pigtail contains one optical fiber, while a dual-fiber pigtail incorporates two fibers. Precision dual-fiber configurations additionally require defined relative fiber positioning.
Q4: Can the fiber spacing be customized?
BYNET can review custom fiber spacing and tolerance requirements according to customer drawings and manufacturing feasibility.
Q5: Can different fiber types and lengths be specified?
Different fiber types, lengths, and coating requirements can be evaluated according to the intended optical application.
Q6: Are dual fiber pigtails suitable for fiber collimator assemblies?
They can be used in compatible fiber collimator designs, provided the fiber spacing, termination structure, and optical requirements match the assembly.
Q7: What information is required for a quotation?
Please provide the required fiber spacing, fiber type, fiber length, termination dimensions, end-face requirements, technical drawing, and estimated quantity.
Request a Quote
Custom Precision Dual Fiber Pigtails for Optical Assemblies
Looking for precision dual fiber pigtails with specified fiber spacing for your optical component project?
Send BYNET your required fiber spacing, fiber specifications, termination requirements, and technical drawing.
Our team can review your requirements and discuss suitable product configurations.
Request a Quote | Send Your Drawing





