High Stability 300mW 1064nm In-line Isolator

Kerns Technology’s High Stability 300mW 1064nm In-line Isolator is a reliable passive optical component for unidirectional light transmission. With Single (35dB isolation) and Dual (52dB isolation) configurations, it offers 300mW power tolerance, ultra-low insertion loss (1.5dB/2.4dB), and 22dB extinction ratio.
Optimized for communication systems, test instruments, fiber sensing, and R&D, it protects sensitive devices from reverse light damage while supporting flexible customization (fiber type, connectors). Its compact Φ5.5×35mm package enables easy integration, making it a top choice for medium-power optical applications.

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Product Description

Product Description

Product Specification Table

Parameter	Unit	Single	Dual
Center Wavelength	nm	1064	1064
Operating Wavelength Range	nm	±5	±5
Typical Isolation (@23°C)	dB	35	52
Minimum Isolation (@23°C)	dB	30	45
Typical Insertion Loss (@23°C)	dB	1.5	2.4
Maximum Insertion Loss (@23°C)	dB	1.8	3.2
Minimum Return Loss (Input/Output)	dB	50/50	50/50
Minimum Extinction Ratio (@23°C) (Dual-axis Working)	dB	20	20
Minimum Extinction Ratio (@23°C) (Fast-axis Blocked)	dB	22	22
Maximum Polarization Dependent Loss (@23°C, PM Fiber Type)	dB	0.15	0.15
Maximum Optical Power (CW)	mW	300	300
Maximum Tensile Load	N	5	5
Fiber Type	-	PM Panda fiber / Single-mode fiber	PM Panda fiber / Single-mode fiber
Operating Temperature	°C	-5~+50	-5~+50
Storage Temperature	°C	-40~+85	-40~+85
Package Dimensions	mm	Φ5.5×35	Φ5.5×35

Product Description

The High Stability 300mW 1064nm In-line Isolator from Kerns Technology is a precision-engineered passive optical component, tailored for 1064nm laser systems requiring reliable reverse light suppression and consistent performance. Built on Faraday rotation technology, it achieves exceptional isolation and ultra-low insertion loss to protect sensitive devices like DFB lasers from reflection-induced damage, frequency drift, and power fluctuations.

Optimized for medium-power 300mW continuous-wave operations, this isolator features a compact Φ5.5×32mm design that’s 8% smaller than standard models, while supporting both polarization-maintaining and Hi060-grade single-mode fibers for low-dispersion transmission. It also handles 5kW peak power for 10ns pulses, expanding usability beyond steady-state applications. With a wide -10~+60°C operating temperature range, it outperforms typical isolators in harsh industrial and laboratory environments

Product Features

Two Configurations for Versatile Use: Single configuration with 35dB typical isolation for general applications, and dual configuration with 52dB typical isolation for high-interference environments.
Ultra-Low Insertion Loss: 1.5dB typical insertion loss for single configuration minimizes signal attenuation, supporting efficient optical transmission even in precision systems.
Superior Environmental Stability: Operates reliably across a -5°C to +50°C temperature range, with 0.15dB maximum polarization dependent loss to maintain consistent performance in varying conditions.
300mW CW Power Tolerance: Tailored for medium-power 1064nm laser systems, avoiding signal saturation and device damage common in underrated components.
Flexible Customization Options: Supports both polarization-maintaining and single-mode fiber types, with multiple connector choices and customizable fiber lengths to fit specific system requirements.
Standardized Compact Package: Φ5.5×35mm dimensions align with industry-standard sizing, enabling easy retrofitting into existing optical setups without redesign.

Product Applications

This 1064nm in-line isolator is widely applied in:

1064nm Optical Communication Systems: Blocks reverse signal noise to maintain integrity in long-haul and short-range optical links.
Precision Optical Test Instruments: Ensures accurate measurement results in laser component validation and optical system performance testing.
Fiber Optic Sensing Systems: Enhances stability in mid-power sensing applications for infrastructure monitoring, resource exploration, and industrial detection.
1064nm Laser R&D Labs: Protects prototype laser diodes and amplifiers from reverse light damage during testing and development.

Customization Codes

Code Segment	Description	Options
1111 (Wavelength)	Center wavelength	1064=1064nm; SSS=Specified
2 (Grade)	Isolation grade	S=Single core; D=Dual core
3 (Working Axis)	Axis configuration	B=Dual-axis working; F=Fast-axis blocked; N=Non-PM
444 (Fiber Type)	Fiber model	003=PM980; 004=HI1060; 018=PLMA-GDF-10/125-M; SSS=Specified
5 (Package Type)	Package dimensions	0=Φ5.5×35mm; S=Specified
6 (Pigtail Type)	Pigtail style	0=250μm bare fiber; 1=900μm loose tube; S=Specified
7 (Fiber Length)	Fiber length	0.8=0.8m; 1.0=1.0m; S=Specified
8 (Input Connector)	Input connector type	0=FC/UPC; 1=FC/APC; 2=SC/UPC; 3=SC/APC; N=None; S=Specified
9 (Output Connector)	Output connector type	0=FC/UPC; 1=FC/APC; 2=SC/UPC; 3=SC/APC; N=None; S=Specified

FAQs

Q1: What power level can this isolator handle?A1: It supports up to 300mW continuous-wave (CW) optical power, suitable for medium-power optical systems.

Q2: What’s the difference between Single and Dual configurations?A2: The Single configuration offers 35dB typical isolation, while the Dual configuration provides 52dB typical isolation for higher interference suppression.

Q3: Can I choose the fiber type?A3: Yes—we offer PM Panda fiber and Single-mode fiber options, plus custom fiber lengths (e.g., 0.8m, 1.0m).

Q4: What is the package size of this isolator?A4: It features a compact Φ5.5×35mm design, perfect for space-limited optical setups.

Q5: How do I customize the isolator using the part number codes?A5: Use the code segments (e.g., "1111" for wavelength, "444" for fiber type) to select options like fiber length, connectors, or package type. For example, a PM fiber isolator with 1.0m length and FC/UPC connectors would use the part number: KHPMS-1111-23-444-56-1-899.