Fiber Isolator Series

The 1064nm Online Optical Isolator (300mW) is a compact, high-isolation passive component designed to suppress back-reflection and prevent feedback in 1064nm laser systems. Engineered for stable, low-loss performance, this isolator ensures the safety and long-term stability of high-power fiber lasers used in demanding industrial and scientific applications.

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Product Description

The Fiber Isolator Series comprises high-performance optical components designed to enable unidirectional light transmission while suppressing back reflections in fiber optic systems. Available in polarization-dependent (PDI), polarization-independent (PII), and polarization-maintaining (PMI) variants, these isolators utilize Faraday rotators and polarization optics to achieve high isolation and low insertion loss. Supporting wavelengths from 405 nm to 2200 nm, the series includes inline isolators, bulkhead isolators, and high-power models, all housed in ruggedized packages for reliable operation in diverse environments.

Features

High Isolation Performance: PDI isolators offer ≥35 dB isolation, PII isolators ≥30 dB, and PMI isolators ≥25 dB with PER ≥25 dB.

Low Loss Design: Insertion loss ≤0.5 dB (PDI), ≤0.8 dB (PII), and ≤1.0 dB (PMI) for efficient signal transmission.

Diverse Configurations:

PDI: Optimized for single-polarization systems (e.g., fiber lasers), requiring input polarization alignment.

PII: Suitable for multi-polarization or unpolarized light in telecom and sensor networks.

PMI: Maintains polarization state in PM fiber systems, critical for coherent communication and precision sensing.

Wide Power Range: Standard models support up to 500 mW; high-power versions handle up to 5 W CW (1064 nm) with thermal coatings.

Environmental Robustness: Meets MIL-STD-810G for shock/vibration and operates in temperatures from -40°C to 85°C.

Applications

Laser Protection: Safeguards diode lasers, solid-state lasers, and fiber lasers from back reflections that cause mode hopping or damage.

Optical Amplifiers: Prevents signal feedback in EDFAs and Raman amplifiers, improving gain stability and noise performance.

Fiber Sensing: Reduces noise in interferometric sensors (e.g., Mach-Zehnder, Sagnac) by eliminating backscattered light interference.

Coherent Communication: Maintains signal integrity in polarization-multiplexed transceivers for 100G+ optical networks.

Medical & Industrial Lasers: Ensures safe, stable operation in laser surgery tools and material processing equipment.

Faq

Q: When should I use a PDI vs. PII isolator?

A: Use PDI for polarized light systems (e.g., lasers) where high isolation is critical; use PII for unpolarized or multi-polarization signals (e.g., LED sources).

Q: Can PMI isolators be used with standard single-mode fibers?

A: Yes, but their polarization-maintaining capability is optimized for PM fibers; using them with standard fibers may reduce PER.

Q: What is the difference between inline and bulkhead isolators?

A: Inline isolators have fiber pigtails for direct splicing, while bulkhead isolators feature panel-mount connectors for easy system integration.

Q: How does temperature affect isolation performance?

A: Isolation drift is ≤±1 dB over -40°C to 85°C for most models; temperature-stabilized versions have ≤±0.5 dB drift.

Q: Can it handle pulsed lasers with high peak power?

A: Yes, up to 10 kW peak power for nanosecond pulses, provided the average power does not exceed the continuous rating.

Model No.	Product Name	Wavelength / Power / Package Size	Optical Parameters (IL / ISO / RL)	Notes
KH001	532nm/633nm Inline Isolator	532nm / 633nm, ≤2W, 40×28×26mm	IL≤2.0dB, ISO≥30dB, RL≥50dB	High isolation and stability
KH002	1030nm Inline Isolator (50mW)	1030±5nm, ≤50mW	IL≤3.2dB, ISO≥30dB, RL≥50dB	Low insertion loss
KH003	1064nm Inline Isolator (300mW)	1064±5nm, ≤300mW	IL≤2.5dB, ISO≥30dB, RL≥50dB	Dual/fast axis design
KH004	1064nm Inline Isolator (2W)	1064nm, ≤2W, 33×17×11.5mm or 60×17×11.5mm	IL≤1.8dB, ISO≥30dB, RL≥50dB	Operating temp: +10~+50℃
KH005	1064nm TGG Type Inline Isolator (10W)	1064nm, ≤10W, 65×17×16mm	IL≤1.2dB, ISO≥30dB, RL≥50dB	High-power TGG structure
KH006	780–1080nm TGG Type Inline Isolator (20W)	780–1080nm, ≤20W, 58×28×26mm	IL≤1.5dB, ISO≥28dB, RL≥50dB	For MOPA or amplifier
KH007	980–1080nm Dual-stage Inline Isolator (TGG, 10W)	980–1080nm, ≤10W, 64×28×26mm	IL≤1.0dB, ISO≥40dB, RL≥55dB	High isolation dual-stage
KH008	980–1080nm High Power Isolator (TGG, 50W/100W)	980–1080nm, ≤50W/100W, 76×38×35mm	IL≤1.0dB, ISO≥30dB, RL≥50dB	For high power laser systems
KH009	980–1080nm Multimode Isolator (TGG, 20W)	980–1080nm, ≤20W, 58×28×26mm	IL≤1.2dB, ISO≥30dB, RL≥50dB	Multimode fiber compatible
KH010	780–1080nm Free Space Isolator (TGG, 100W)	780–1080nm, ≤100W, Customizable	IL≤1.0dB, ISO≥30dB, RL≥50dB	Free-space input/output
KH011	1310–2050nm PM Isolator (500mW)	1310–2050nm, ≤0.5W, Custom wavelength	IL≤1.5dB, ISO≥30dB, RL≥55dB	For PM fiber
KH012	1310–1550nm High Power Isolator (20W)	1310–1550nm, ≤20W, Customizable	IL≤1.0dB, ISO≥30dB, RL≥50dB	SM/PM fiber compatible