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Bias Voltage Control in Pulsed Applications for Mach–Zehnder Electrooptic Intensity Modulators
- Source :
- IEEE Transactions on Control Systems Technology. 25:1890-1895
- Publication Year :
- 2017
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2017.
-
Abstract
- Mach–Zehnder electrooptic intensity modulators (EOM) provide efficient intensity modulation in optical systems and can be used to shape laser pulses. It is necessary to avoid a low extinction ratio—which can cause a significant prepulse—by maintaining a low base modulation. The EOM’s modulation can be modeled by its nonlinear transfer function and is dependent on environmental conditions. A feedback algorithm was devised to regulate the EOM’s base intensity output and account for these dynamic environmental conditions. The field programmable gate array-based control algorithm interlaces a set of diagnostic pulses between the laser’s main pulses to map the transfer function. After mapping, the algorithm utilizes curve fitting to accurately target the minimum of the EOM’s transfer function and maintain the EOM’s highest possible extinction ratio. Testing demonstrated the effectiveness of the algorithm in maintaining a high extinction ratio in response to both the temperature and temporal drift of the transfer function.
- Subjects :
- Physics
Extinction ratio
business.industry
02 engineering and technology
Mach–Zehnder interferometer
Laser
Transfer function
law.invention
020210 optoelectronics & photonics
Optics
Control and Systems Engineering
Modulation
law
0202 electrical engineering, electronic engineering, information engineering
Curve fitting
Electrical and Electronic Engineering
business
Intensity modulation
Intensity (heat transfer)
Subjects
Details
- ISSN :
- 15580865 and 10636536
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Control Systems Technology
- Accession number :
- edsair.doi...........053dfc29318217823ad20f9fff8026c7