Microoptical module with a WDM filter and an optical isolator fo

Details Microoptical module with a WDM filter and an optical isolator fo Microoptical module with a WDM filter and an optical isolator fo

1998-06-18

2000-06-27

Lee, John D.

Optical waveguides

With optical coupler

Plural

385 52, 359494, 359498, G02B 628, G02B 530

Patent

active

06081635&

ABSTRACT:
The invention relates to an optical isolator of the type commonly employed in fiber-optic data transmission and amplifier systems. The optical isolator of the invention has a support (TR) which is provided with a recess (A). Two wedge-shaped plates (KP1, KP2) made of an optically birefringent material and a Faraday rotator (FR) are inserted in this recess (A). Preferably, the support (TR) is a silicon crystal in which a very precise recess (A) can be formed by wet-chemical etching. The individual components are passively adjusted in the recess by stops. The optical isolator of the invention therefore consists only of those components which are absolutely essential for its operation. Also provided is an advantageous wavelength multiplexer module with an integrated optical isolator. The construction of the wavelength multiplexer module is very simple and requires only two spherical lenses as imaging elements for three optical inputs/outputs.

REFERENCES:
patent: 5768005 (1998-06-01), Cheng et al.
patent: 5808793 (1998-09-01), Chang et al.

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