Variable optical attenuator with MEMS devices
First Claim
1. A variable optical attenuator comprising:
- a first lens configured to collimate an input light received on a first port and focus an output light on a focus point proximate to a second port;
a MEMS device including a reflection surface having a tilting angle thereof controllable by a control variable, the MEMS device being operable to variably attenuate an amount of light exiting the variable optical attenuator including adjusting the tilting angle;
a second lens having a focus point positioned proximate to the reflection surface of the MEMS device; and
a wedge positioned between the first lens and the second lens and configured to refract the input light received from the first lens to enter the second lens and refract the output light received from the second lens to enter the first lens.
1 Assignment
0 Petitions
Accused Products
Abstract
A variable optical attenuator includes a first lens, a MEMS device, a second lens, and a wedge. The first lens is configured to collimate an input light received on a first port and focus an output light on a focus point proximate to a second port. The MEMS device includes a reflection surface having a tilting angle thereof controllable by a control variable. The second lens has a focus point positioned proximate to the reflection surface of the MEMS device. The wedge is positioned between the first lens and the second lens and is configured to refract the input light received from the first lens to enter the second lens and refract the output light received from the second lens to enter the first lens.
-
Citations
25 Claims
-
1. A variable optical attenuator comprising:
-
a first lens configured to collimate an input light received on a first port and focus an output light on a focus point proximate to a second port;
a MEMS device including a reflection surface having a tilting angle thereof controllable by a control variable, the MEMS device being operable to variably attenuate an amount of light exiting the variable optical attenuator including adjusting the tilting angle;
a second lens having a focus point positioned proximate to the reflection surface of the MEMS device; and
a wedge positioned between the first lens and the second lens and configured to refract the input light received from the first lens to enter the second lens and refract the output light received from the second lens to enter the first lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method for manufacturing a variable optical attenuator comprising:
-
configuring a first lens to collimate an input light exiting from a first port and focus an output light on a focus point proximate to a second port;
providing a MEMS device that includes a reflection surface having a tilting angle thereof controllable by a control variable, the MEMS device being operable to variably attenuate an amount of light exiting the variable optical attenuator including adjusting the tilting angle;
configuring a second lens to have a focus point thereof positioned proximate to the reflection surface of the MEMS device; and
positioning a wedge between the first lens and the second lens; and
configuring the wedge to refract the input light received from the first lens to enter the second lens and refract the output light received from the second lens to enter the first lens. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. A method for changing an attenuation of light traveling from a first port to a second port in a variable optical attenuator, the method comprising:
-
providing a MEMS device that includes a reflection surface having a tilting angle thereof controllable by a control variable;
collimating an input light received from the first port;
refracting the input light after collimating the input light;
focusing the input light on the reflection surface of the MEMS device after refracting the input light;
reflecting an attenuated amount of the input light with the MEMS device as the output light including adjusting the tilting angle, the attenuation being a ratio between a power of the output light in a second port and a power of an input light in the first port;
collimating the output light received from the MEMS device;
refracting the output light after collimating the output light; and
focusing the output light on a focus point proximate to the second port after refracting the output light. - View Dependent Claims (24, 25)
-
Specification