850nm High Power Circulator

Box Optronics supplies the 850nm High Power Circulator, a high-performance passive optical component designed for precise light direction control in fiber-optic systems. This 3-port circulator enables non-reciprocal transmission, routing optical signals from port to port in a sequential manner while maintaining excellent optical performance.

Featuring typical insertion loss as low as 1.0dB, high isolation of 25dB typical, and high return loss of 45dB minimum, this circulator is ideal for high-power 850nm applications. It supports total average power handling up to 500mW/1W/5W/10W across ports, making it suitable for demanding fiber laser and amplifier systems.

Housed in a compact 58×28×26mm package with 780-HP fiber pigtails, the 850nm high power circulator offers stability and reliable long-term performance.

Key Features

• High isolation: 25dB typical peak isolation, 22dB minimum

• Low insertion loss: 1.0dB typical, 1.5dB maximum

• High return loss: 45dB minimum (Input/Output)

• Low polarization dependent loss (PDL): ≤0.15dB

• High power handling: up to 500mW, 1W, 5W, 10W

• High peak power capability: <10kW for ns pulse operation

• High crosstalk suppression: 45dB minimum

• Compact and robust package design: 58×28×26mm

• 780-HP fiber pigtails for high-power applications

• Excellent reliability and long-term stability

• 3-port non-reciprocal light transmission

• Wide operating temperature range: +10°C to +50°C

Typical Applications

• Fiber optic sensing systems

• Fiber optic instrumentation and test equipment

• 850nm fiber laser systems

• Biomedical imaging and OCT systems

• Research and development laboratories

• Distributed feedback (DFB) laser protection

Technical Specifications

Optical Specifications (T=25°C)

Mechanical and Environmental Specifications

*Note: Above specifications are for devices without connectors. For devices with connectors, the handling power is limited to 1W, insertion loss is 0.3dB higher, return loss is 5dB lower, and extinction ratio is 2dB lower.

Package Dimensions

The 850nm High Power Circulator is packaged in a compact, robust housing with the following dimensions (unit: mm):

• Package size: 58 × 28 × 26 mm

• 3-port configuration with fiber pigtails

• 4 mounting holes for secure installation

• Tolerance: ±0.5mm

Port Configuration

This 3-port optical circulator enables unidirectional optical signal routing in a 1 → 2 → 3 → 1 sequence:

• Port 1 → Port 2: Low insertion loss forward transmission  

• Port 2 → Port 3: Routing of backscattered/reflected signals  

• Port 3 → Port 1: Forward transmission completing the circulation loop, while maintaining high isolation in reverse paths

The device utilizes a non-reciprocal optical design to ensure directional signal propagation and effective isolation between non-adjacent ports, making it ideal for fiber sensing, laser protection, and optical measurement systems.

Working Principle

An 850nm high-power optical circulator is a passive multi-port non-reciprocal device that routes optical signals in a sequential 1 → 2 → 3 → 1 direction, enabling directional signal management in fiber optic systems.

The device is based on the Faraday rotation effect combined with polarization-dependent optical routing components.

Working principle:

•Faraday Rotator: introduces a fixed non-reciprocal polarization rotation (typically 45°), independent of propagation direction

•Polarization routing optics: direct optical signals based on polarization state

•Non-reciprocal transmission: ensures directional signal routing with high isolation between reverse propagation paths

Key functions:

•Separates forward and backward propagating optical signals

•Protects laser sources from back-reflections

•Enables bidirectional operation in fiber optic sensing and laser systems

•Supports signal routing in measurement and sensing architectures

Why Choose Box Optronics?

•Strict quality control with 100% testing before shipment

•Competitive pricing with stable bulk delivery capability

•Flexible customization options for wavelength, power, fiber, and connectors

•7×24 hours technical support and fast response

•Sample testing available for evaluation

•Global shipping with DHL, UPS, and FedEx express delivery

Ordering Information

Model Nomenclature

HPCIR - XXX - X - X - X - X - XX - XX

Example: HPCIR - 850 - 1 - 1 - 1 - 0 - 10 - FA

850nm High Power Circulator, 780-HP fiber, 900μm loose tube, 1m fiber length, 58x28x26mm package, 10W handling power, FC/APC connector

Available Customization Options

•Center wavelength: 830nm, 850nm, other wavelengths available upon request

•Power rating: 500mW, 1W, 5W, 10W, higher power available for custom designs

•Fiber type: 780-HP, other specialty fibers

•Fiber length: 0.5m, 0.8m, 1m, 1.5m, 2m (custom lengths available)

•Pigtail type: 250μm bare fiber, 900μm loose tube, 3.0mm loose tube

•Connector type: FC/UPC, FC/APC, SC/APC, LC/APC, or custom connectors

•Package size: Standard 58x28x26mm or custom package dimensions

•4-port circulator configurations available upon request

For custom requirements, please contact our sales team.

Datasheet and Test Report

Each 850nm High Power Circulator is shipped with a comprehensive test report documenting measured performance parameters. The datasheet PDF file contains detailed specifications and performance curves.

•Individual test report included with each unit

Datasheet

Terms of Quote and Payment

Quote Terms

•EXW (Ex Works): Recommended if you have a DHL/UPS/FedEx account. We ship using your account; no shipping cost is charged by us.

•DAP (Delivered at Place): If you don't have a courier account, we can arrange shipping with prepaid freight.

•Other terms: Please contact us to discuss.

Payment Terms

•PayPal: Fast and secure payment for samples and small orders

•T/T (Bank Transfer): Standard payment method for normal production orders

•Alibaba Trade Assurance: Secure order protection for online transactions with buyer guarantee

•Flexible Payment Terms: Negotiable for long-term or strategic partners

Lead Time

•Standard production: ~10-15 working days

•Custom configurations: 15-20 working days

•Volume orders: Please contact for production schedule

•International shipping: ~3-5 working days (DHL/UPS/FedEx express)

•Expedited service: Available upon request

Operation Notes and Handling

ESD Protection

While optical circulators are passive devices, proper handling is required to maintain performance and reliability.

•Work on a clean, dust-free surface

•Avoid touching the fiber end-faces directly

•Keep dust caps on connectors when not in use

•Use proper ESD protection during handling and installation

Fiber Handling

•Avoid excessive bending of the fiber

•Do not pull or twist the fiber pigtails

•Clean fiber connectors before connection

•Always use dust caps when the connector is not in use

•Inspect fiber end-face for damage before use

Power Handling Considerations

•Ensure total input power does not exceed the rated maximum

•Use proper power monitoring to avoid overload

•Allow for proper heat dissipation at high power levels

•Mount on a heat sink for high power continuous operation

•Note: Connector-equipped devices have reduced power handling (1W max)

•Avoid sudden power spikes that may exceed peak power ratings

Installation and Mounting

•Mount the circulator securely using the 4 mounting holes

•Ensure proper alignment to minimize additional loss

•Allow sufficient space for fiber bending radius

•Operate within the specified temperature range for reliability (+10°C to +50°C)

•Avoid mechanical stress on the fiber pigtails

•Ensure proper port orientation for correct signal routing