A dual-mode variable optical power splitter using a Digital Spatial Light Modulator and a variable focus lens
| Autor: | Syed Azer Reza, Hamid Suleman, Tariq Shamim Khwaja |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Spatial light modulator
Computer science business.industry Optical power Signal Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Power (physics) law.invention Lens (optics) Optics Control and Systems Engineering law Splitter Focal length Electrical and Electronic Engineering business Focus (optics) Instrumentation |
| Zdroj: | Optical Fiber Technology. 47:118-125 |
| ISSN: | 1068-5200 |
| Popis: | This paper describes the design of a variable optical power splitter which splits input optical signal power into variable ratios between two output ports. The proposed design is a hybrid scheme which uses a conventional Digital Spatial Light Modulator (DSLM) and a tunable focus Electrically Tunable Lens (ETL). The proposed splitter has an inherent dual-mode of operation and is capable of operating in a DSLM-only, ETL-only or a hybrid DSLM/ETL mode depending on the desired accuracy of the power split ratio. We show that the improved power splitter design can potentially offer a fine split ratio control through additional ETL focal length control. Moreover, it eliminates the need of ascertaining an exact random image pattern through hit-and-trial for an exact split ratio in a DSLM-only splitter mode. The DSLM is used to obtain the closest value to the desired split ratio using a fixed circular pattern with a variable radius while the ETL is tuned for further fine-tuning the split ratio in order to get closer to the required value. We also show that a dual-mode control delivers multiple possible solutions for any desired split ratio. Experimental results validate the working of the proposed splitter design. |
| Databáze: | OpenAIRE |
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