Dong Lie Xu

6909820, Jun 21, 2005

Nov 6, 2002

10/290061

Wei Qiu - Gardena CA, US
Zhanxiang Zhang - San Jose CA, US
Jianmin Gao - San Jose CA, US
Dong Xu - San Jose CA, US

Rainbow Communications, Inc. - San Jose CA

G02B006/26

385 21, 385 18

A planar 2×2 switch is provided for controllably coupling first and second input channels to first and second output channels. The switch includes a first reflector that is movable between a first position and a second position. When the first reflector is in its second position, it reflects light from the first input channel to the second output channel and reflects light from the second input channel to the first output channel. When the first reflection is in its first position, it does not affect the optical beams in the switch. Instead, these beams are reflected by a second reflector which has two reflective surfaces. The second reflector reflects light from the first input channel to the first output channel and reflects light from the second input channel to the second output channel. Switches having a larger number of input and output channels are also provided.

20040086221, May 6, 2004

Nov 6, 2002

10/290098

Wei Qiu - Gardena CA, US
Zhanxiang Zhang - San Jose CA, US
Jianmin Gao - San Jose CA, US
Dong Xu - San Jose CA, US

G02B006/293

385/024000

A first embodiment of the present invention provides a dense wavelength division multiplexer which has a planar array of input optical channels, each channel capable of receiving an optical signal. Coupled to this planar array of input channels is a first waveguide concentrator which facilitates the reduction of the spacing between the cores of the input optical channels. A first collimating provides means for transforming the optical signals into a collimated beam. A wavelength dependent element is disposed proximate the first collimating means. A second collimating means refocuses the collimated beam into an optical channel in a second waveguide concentrator, which facilitates the expansion of the spacing between the cores of the output channels, and ultimately to an array of output optical channels.