光环形器是一种多端口的具有非互易特性的光器件。光信号只能沿规定顺序端口正向导通且反向截止。它的典型结构有3个端口，信号可以从端口1传输到端口2，以及从端口2传输到端口3。光环形器广泛应用于通信系统和光纤传感等领域。
恒研光电设计并生产各种高性能的光环形器，包括自由空间、单模光纤、多模光纤、保偏光纤和定制类光环形器。波长涵盖可见光和近红外短波400-1100nm，以及常规通信波段1200-1700nm。小型化，集成化，客户化是我们的产品特色。
● Single-Mode Circulator
→ Single-Mode 3-Port Optical Circulator (1310, 1480, 1550, 1590nm)
→ Single-Mode 3-Port Optical Circulator: Ultra-Broadband (1290-1620nm)
→ Single-Mode 3-Port Optical Circulator (2000nm)
→ Single-Mode 3-Port Optical Circulator (C+L Band)
→ Single-Mode 3-Port Optical Circulator (1064nm)
→ Single-Mode 4-Port Optical Circulator (1310, 1480, 1550, 1590nm)
→ Single-Mode N-Port Optical Circulator (1310, 1480, 1550, 1590nm)
● Mini: Single-Mode 3-Port Optical Circulator (1310, 1550nm, C+L Band)
→ Mini: Single-Mode 3-Port Optical Circulator (1310, 1550nm, C+L Band)
● Polarization-Maintaining (PM) Circulator
→ Polarization-Maintaining (PM) 3-Port Optical Circulator (1310, 1480, 1550, 1590nm)
→ Polarization-Maintaining (PM) 3-Port Optical Circulator (2000nm)
→ Polarization-Maintaining (PM) 3-Port Optical Circulator (C+L Band)
→ Polarization-Maintaining (PM) 3-Port Optical Circulator (1064nm)
→ Polarization-Maintaining (PM) 4-Port Optical Circulator (1310, 1480, 1550, 1590nm)
→ Polarization-Maintaining (PM) N-Port Optical Circulator (1310, 1480, 1550, 1590nm)
● 3-Port Polarization-Dependent Free-Space Circulator (1310, 1480, 1550, 1590nm)
→ 3-Port Polarization-Dependent Free-Space Circulator (1310, 1480, 1550, 1590nm)
● Visible/IR (TGG): (532, 635, 650, 780, 850, 980, 1030, 1060nm)
→ 3-Port Optical (TGG Type) Circulator: Single-Mode
→ 3-Port Optical (TGG Type) Circulator: Polarization-Maintaining (PM)
→ 3-Port Optical (TGG Type) Circulator: Free-Space (Core), Polarization-Dependent
→ 3-Port Optical (TGG Type) Circulator: Polarization-Maintaining (PM) (405nm)
→ 3-Port Optical (TGG Type) Circulator: Polarization-Maintaining (PM) High-Isolation (1060nm)
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