TGG Crystal Based Polarization Maintaining Optical Circulator with High Extinction Ratio Low Insertion Loss and Wide Wavelength Coverage

Gezhi Photonics TGG-based polarization maintaining optical circulator adopts high-performance terbium gallium garnet magneto-optic crystal as the core component. It covers a wide wavelength range from 532nm to 1150nm, including visible and near-infrared common bands.

This PM circulator features ultra-low insertion loss, superior isolation, high extinction ratio and high return loss. It supports CW power handling from 0.5W up to 20W, and two polarization axis working modes (Type B dual-axis & Type F slow-axis only). Standard 70×28×26mm compact package is available, with fully customizable pigtail fiber, fiber length, connector type and pulse peak power. Ideal for fiber laser amplifiers, medical optical instruments and precision optical test systems.

• Low Insertion Loss: ≤1.5dB for 780–1150nm bands, ≤2.5dB for 532/635/680nm
• High Isolation: Minimum isolation ≥20dB, peak isolation up to ≥26dB
• High Extinction Ratio: ≥18dB (Type B), ≥20dB (Type F)
• High Return Loss ≥45dB, ultra-low crosstalk
• Wide wavelength coverage: 532, 635, 680, 780, 808, 850, 930, 980, 1030, 1053, 1064, 1150nm
• Multiple CW power options: 0.5W, 5W, 10W, 20W
• Two polarization alignment modes: B (both axis), F (slow axis only)
• Various PM fiber choices: PM460, PM630, PM780, PM980, PM1060
• Optional pigtail: Bare fiber / 900μm loose tube; customizable fiber length
• Multiple connector options: FC/UPC, FC/APC, SC/UPC, SC/APC
• Wide working temperature range: 0℃ ~ +60℃; storage temperature: -10℃ ~ +75℃
• Custom packaging, wavelength and pulse power specifications supported

• Fiber Amplifiers & Fiber Laser Systems
• Medical Optical Equipment & Medical Lasers
• Optical Test and Measurement Instruments
• Precision Polarization Optical Circuits
• Interferometry & Lab Research Setups

Packaging Information Table