Claims
- 1. A method of suppressing optical power transients, comprising:
(a) sampling output power of an optical amplifier; (b) using the results of step (a) in predicting power transients of said optical amplifier by use of an approximation of a power transient as an exponential approach to a saturation value; and (c) adjusting said optical amplifier according to the results of step (b).
- 2. The method of claim 1, wherein:
(a) said approximation is P(t)−P(0)=(1−e−t/τ)[P(∞)−P(0)] where P(t) is the power at time t, P(0) is the power at time 0, P(∞) is the asymptotic power, and τ is the decay time constant.
- 3. The method of claim 1, wherein:
(a) said optical amplifier is an erbium-doped fiber amplifier together with a dynamic optica filter.
- 4. The method of claim 3, wherein:
(a) said adjusting of step (c) of claim 1 is by changing settings in said dynamic optical filter.
- 5. The method of claim 3, wherein:
said dynamic optical filter includes a wavelength spreader, a micromirror array, and a wavelength combiner.
- 6. A method of suppressing optical power transients in a multichannel optical network, comprising:
(a) sampling output power of an optical amplifier in a multichannel optical network; (b) using the results of step (a) in predicting power transients of said optical amplifier by use of an approximation of a power transient as an exponential approach to a saturation value; (c) adjusting said optical amplifier according to the results of step (b); and (d) repeating steps (a)-(c); (e) whereby power transients arising from adding or dropping of channels in said optical network are adaptively controlled.
- 7. The method of claim 6, wherein:
(a) said approximation is P(t)−P(0)=(1−e−t/τ)[P(∞)−P(0)] where P(t) is the power at time t, P(0) is the power at time 0, P(∞) is the asymptotic power, and τ is the decay time constant.
- 8. The method of claim 7, wherein:
(a) said optical amplifier includes an erbium-doped fiber amplifier and a dynamic optical filter; and (b) said adjusting of step (c) of claim 6 is by settings of said dynamic optical filter.
- 9. The method of claim 8, wherein:
said dynamic optical filter includes a wavelength spreader, a micromirror array, and a wavelength combiner.
- 10. The method of claim 6, wherein:
(a) said optical amplifier includes a cascade of a plurality of individual optical amplifiers and a dynamic optical filter; (b) said sampling output power is of said cascade; (c) said approximation for said cascade is a combination of approximations for each of said individual optical amplifiers, and said approximation for one said individual optical amplifiers is P(t)−P(0)=(1−e−t/τ)[P(∞)−P(0)] where P(t) is the power at time t, P(0) is the power at time 0, P(∞) is the asymptotic power, and τ is the decay time constant; and (d) said adjusting of step (c) of claim 6 is by settings of said dynamic optical filter.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority from provisional application: Serial No. 60/313,559, filed 08/20/01. Cofiled application Ser. Nos. 10/______,______ have a common assignee.
Provisional Applications (1)
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Number |
Date |
Country |
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60313559 |
Aug 2001 |
US |