Multi-port circulator

Details Multi-port circulator Multi-port circulator

2005-05-03

2005-05-03

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

Polarization without modulation

C359S484010

Reexamination Certificate

active

06888971

ABSTRACT:
An extendable four-port circulator includes a middle birefringent crystal, a first birefringent crystal, a first non-reciprocal device, a second birefringent crystal, and a second non-reciprocal device. The first non-reciprocal device is coupled to the first birefringent crystal. The second non-reciprocal device is coupled to the second birefringent crystal. The middle birefringent crystal includes a first surface, a second surface, a third surface, and a fourth surface. The first surface is coupled to the first non-reciprocal device. The second surface is coupled to the second non-reciprocal device. The third surface defines first and second extension interfaces. The fourth surface defines third and fourth extension interfaces. A multi-port circulator includes at least one extendable four-port circulator.

REFERENCES:
patent: 5408354 (1995-04-01), Hosokawa
patent: 5574596 (1996-11-01), Cheng
patent: 5909310 (1999-06-01), Li et al.
patent: 6246807 (2001-06-01), Lu et al.
patent: 6331912 (2001-12-01), Au-Yeung et al.
patent: 1251175 (2000-04-01), None

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