Thumbnail of Free Space Isolator photo 1

Description

Free Space Isolator by DK Photonics Technology Limited

The Free Space Isolator from DK Photonics Technology Limited is a precision-engineered optical component designed to protect sensitive laser sources and optical transmitters from detrimental back reflections. By allowing light to pass in one direction while effectively blocking any return signal, this isolator ensures stable operation and enhanced performance in high-speed optical communication systems and laser diode packaging.

Engineered for versatility, the Free Space Isolator is available in both single-stage and dual-stage configurations, with center wavelengths tailored to 1310 nm, 1490 nm, or 1550 nm, as well as CWDM applications. Its compact, epoxy-free optical path design minimizes insertion loss and maximizes isolation, making it suitable for demanding environments where space and reliability are critical. The isolator supports a range of clear aperture diameters from 0.40 mm to 1.5 mm, accommodating various beam sizes and system requirements.

The robust construction of the Free Space Isolator ensures high isolation levels—up to 60 dB in dual-stage models—while maintaining low insertion loss, which is essential for maintaining signal integrity in advanced photonic systems. Its wide operating temperature range from -40°C to +85°C, along with flexible packaging options including square, round, and U-shaped housings, allows seamless integration into a variety of optical assemblies. This makes it an ideal choice for applications in optical transmitters, laser diode packaging, and other photonics systems requiring reliable protection from back reflections.

Free Space Isolator

Visit the DK Photonics Store

Specifications

Wavelength: 1310 nm
Bandwidth: 15 nm
Power: 0.3 W
Isolation Range: 40 – 55 dB
Center Wavelength (λc): 1310 or 1550 nm and CWDM
Min Peak Isolation (Single Stage, P Grade): 40 dB
Min Peak Isolation (Single Stage, A Grade): 38 dB
Min Peak Isolation (Dual Stage, P Grade): 60 dB
Min Peak Isolation (Dual Stage, A Grade): 55 dB
Min Bandwidth Isolation (Single Stage, P Grade): 32 dB
Min Bandwidth Isolation (Single Stage, A Grade): 30 dB
Min Bandwidth Isolation (Dual Stage, P Grade): 42 dB
Min Bandwidth Isolation (Dual Stage, A Grade): 40 dB
Max Insertion Loss (Single Stage, P Grade): 0.20 dB
Max Insertion Loss (Single Stage, A Grade): 0.25 dB
Max Insertion Loss (Dual Stage, P Grade): 0.40 dB
Max Insertion Loss (Dual Stage, A Grade): 0.50 dB
Max Bandwidth Insertion Loss (Single Stage, P Grade): 0.30 dB
Max Bandwidth Insertion Loss (Single Stage, A Grade): 0.35 dB
Max Bandwidth Insertion Loss (Dual Stage, P Grade): 0.50 dB
Max Bandwidth Insertion Loss (Dual Stage, A Grade): 0.60 dB
Clear Aperture: 0.9 mm or other (0.40 mm to 1.5 mm standard)
Max Optical Power: 300 mW
Operating Temperature: -40 to +85 ℃
Storage Temperature: -40 to +100 ℃

Got questions about specs? Use the inquiry form to ask.

Document icon Download Data Sheet Download icon

Features

  • High Isolation Performance: Achieves up to 60 dB isolation (dual stage), ensuring superior protection against back-reflected light in optical systems.
  • Low Insertion Loss: Minimal signal loss with insertion loss as low as 0.20 dB (single stage), maximizing system efficiency.
  • Polarization Dependent: Designed for polarization-sensitive applications, ideal for advanced optical communication systems.
  • Epoxy-Free Optical Path: Ensures high reliability and long-term stability by eliminating epoxy in the optical path.
  • Wide Wavelength Compatibility: Available for 1310 nm, 1490 nm, 1550 nm, and CWDM wavelengths to suit diverse application needs.
  • Versatile Clear Aperture Options: Standard clear aperture diameters from 0.40 mm to 1.5 mm for compatibility with various beam sizes.
  • Compact and Flexible Packaging: Multiple package shapes (square, round, U-shaped) and sizes for easy integration into space-constrained designs.
  • High Power Handling: Supports up to 300 mW optical power, suitable for high-power laser diode and transmitter applications.
  • Wide Operating Temperature Range: Reliable operation from -40°C to +85°C, with storage up to +100°C, for use in demanding environments.
  • Single and Dual Stage Configurations: Choose between single or dual stage isolators for optimal isolation and insertion loss balance.
  • Ideal for Optical Transmitters and Laser Diode Packaging: Specifically designed for use in high-speed optical transmitters and pump lasers requiring backward light isolation.
  • Customizable Specifications: Multiple grades (P Grade, A Grade), aperture sizes, and package dimensions available to meet specific project requirements.

Applications

  • High-Speed Optical Transmitters
    Used to prevent back-reflected light from interfering with transmitter performance, ensuring stable and reliable data transmission in fiber optic communication systems.
  • Laser Diode Packaging
    Protects sensitive laser diodes from damaging back reflections, enhancing the longevity and performance of laser modules in telecom and industrial applications.
  • Optical Amplifiers (EDFA, Raman, SOA)
    Integrated into amplifier modules to suppress unwanted feedback and improve signal integrity in optical networks.
  • Pump Laser Protection
    Shields pump lasers in fiber amplifiers and other photonic devices from back-propagating light, preventing instability and damage.
  • Fiber Optic Sensing Systems
    Ensures accurate measurement by minimizing noise and interference caused by reflected signals in distributed and point fiber optic sensors.
  • Optical Test and Measurement Equipment
    Maintains measurement accuracy by isolating test sources from reflected light in laboratory and field testing setups.
  • Wavelength Division Multiplexing (WDM) Systems
    Enhances channel isolation and system performance in DWDM and CWDM networks by preventing crosstalk from reflected signals.
  • Free Space Optical Communication
    Used in free space optical links to block unwanted back reflections, improving link stability and data throughput.
  • Medical Laser Systems
    Protects laser sources in medical diagnostic and therapeutic equipment from back-reflected light, ensuring patient safety and device reliability.
  • Quantum Optics and Research
    Essential in laboratory setups for quantum communication and photonics research to maintain signal purity and reduce noise from back reflections.
  • Laser Marking, Cutting, and Engraving Systems
    Prevents feedback into high-power industrial lasers, safeguarding equipment and maintaining process quality.
  • Optical Isolator Modules for OEM Integration
    Designed for integration into custom optical assemblies and modules, supporting a wide range of photonic device manufacturing.

Frequently Asked Questions

What is a free space optical isolator and what are its main applications?
A free space optical isolator is a passive optical component designed to allow light to pass in one direction while blocking reflected or backward light. This helps protect sensitive optical equipment, such as laser diodes and optical transmitters, from damage caused by back reflections. Common applications include high-speed optical transmitters and laser diode packaging.
What are the key features of DK Photonics free space isolators?
DK Photonics free space isolators feature high isolation, polarization dependence, epoxy-free optical paths, compact size, and versatile packaging options. These features ensure reliable performance, minimal signal loss, and compatibility with various optical systems.
What wavelength options are available for DK Photonics free space isolators?
DK Photonics free space isolators are available for center wavelengths of 1310 nm, 1490 nm, 1550 nm, and CWDM (Coarse Wavelength Division Multiplexing) bands, making them suitable for a wide range of fiber optic communication applications.
How do single stage and dual stage free space isolators differ?
Single stage isolators provide standard isolation and insertion loss performance, while dual stage isolators offer higher isolation and slightly higher insertion loss. Dual stage isolators are ideal for applications requiring maximum protection against back reflections.
What are the available clear aperture sizes and package options?
Standard clear aperture diameters range from 0.40 mm to 1.5 mm, with common sizes like 0.45 mm, 0.70 mm, and 1.10 mm. Packaging options include square, round, and U-shaped housings, as well as various custom sizes to fit specific installation requirements.
What is the maximum optical power handling and operating temperature range?
DK Photonics free space isolators can handle up to 300 mW of optical power. They operate reliably in temperatures ranging from -40°C to +85°C, with storage temperatures up to +100°C, ensuring durability in demanding environments.
How do I select the right DK Photonics free space isolator for my application?
To select the appropriate isolator, consider the required stage (single or dual), grade (P or A), center wavelength (1310 nm, 1490 nm, 1550 nm, or CWDM), clear aperture size, and package dimensions. Refer to the ordering information format (FSI-①-②-③③-④④④-⑤⑤) to specify your desired configuration.

Got more questions? Use the inquiry form to ask the supplier directly.

Similar Products

Request Quote