Optics: measuring and testing – Standard – Surface standard
Patent
1997-12-10
1999-08-31
Kim, Robert
Optics: measuring and testing
Standard
Surface standard
356394, 356229, 356230, G01J 102
Patent
active
059460865
ABSTRACT:
A mean optical power controller that controls power using a voltage controlled optical attenuator (VCOA) is disclosed. This controller uses a control loop in which a signal indicative of the present optical power level is compared to a signal indicative of the desired optical power level, with the difference then being used as input into the VCOA. This controller generates the required variety of signals indicative of the desired optical power level, or reference signals, without having to rely on a CPU. It does this by storing in a local storage means the voltage-values of the reference signals required to realize each supported user-defined optical power level. During the operation of the controller, the voltage-value corresponding to each selected power-level is passed to one or more DACs, where it is converted into a reference signal. A plurality of DACs can be used, which each convert a fraction of each voltage-value, so as to implement a logarithmic relation between the user-defined power levels and the voltage-values. This provides fine control over the optical power level, over a sufficiently large range of values.
REFERENCES:
patent: 4927266 (1990-05-01), Sugiura et al.
Kim Robert
Northern Telecom Limited
Ratliff Reginald A.
LandOfFree
Optical mean power controller with provisionable output levels does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical mean power controller with provisionable output levels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical mean power controller with provisionable output levels will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2427690