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Fiber inline Mach-Zehnder interferometer based on femtosecond laser inscribed waveguides.
Optics Letters
|November 1, 2017
Summary
A novel in-fiber Mach-Zehnder interferometer was created using femtosecond laser pulses. This compact device accurately measures temperature and strain, showing potential for diverse applications.
Area of Science:
- Optics and Photonics
- Fiber Optic Sensors
- Nanofabrication
Background:
- Mach-Zehnder interferometers are sensitive optical devices.
- Traditional interferometers can be bulky and fragile.
- In-fiber integration offers miniaturization and robustness.
Purpose of the Study:
- To demonstrate a new in-fiber Mach-Zehnder interferometer (MZI).
- To fabricate the MZI using direct femtosecond laser pulse inscription.
- To validate its performance for temperature and strain sensing.
Main Methods:
- Fabrication of in-fiber optical waveguides via femtosecond laser inscription in a single-mode fiber.
- Coupling light out of the fiber core, guiding it along the cladding, and coupling it back into the core.
- Utilizing the device for precise temperature and strain measurements.
Main Results:
- Successful demonstration of a novel in-fiber Mach-Zehnder interferometer.
- The device exhibited robust performance in measuring temperature and strain.
- The fabrication method allowed for flexible and precise control.
Conclusions:
- The in-fiber MZI is a compact and robust sensor.
- Femtosecond laser inscription is an effective fabrication technique.
- This technology holds significant potential for various sensing applications.
