Wavelength tuning of fiber Bragg gratings over 90 nm using a simple tuning package

Self-heated fiber Bragg grating sensors

“…In order to enhance the functionality of fiber-optic components, intensive research has been carried out in the past few years directed toward the development of tunable FBGs. Tuning by various methods including on-fiber electrical heating, [2][3][4] electrowetting, 5 piezo-electric actuation, 6 and mechanical actuation 7 has been demonstrated. Despite advances in tunability, a common drawback for all active fiber components still remains.…”

Integrated Photonic Devices Incorporating Low-Loss Fluorinated Polymer Materials

“…Polymers can be elongated by over 10% before they reach their elastic limit, whereas less than 1% of elongation is available in silica fiber [36]. Hence, a significant enhancement of the tuning capability could be achieved if one could produce a Bragg reflecting waveguide on a flexible polymer substrate, as demonstrated in our preliminary experiment [37].…”

Piezo-electric tunable fiber Bragg grating diode laser for chemical sensing using wavelength modulation spectroscopy

“…Recent developments in tunable FBG devices promise a much wider tuning range. Over 90 nm tuning of FBG center wavelength has been demonstrated by means of mechanical bending [9]. Using a multilayer PZT actuator fused directly to the grating, it is possible to tune the FBG wavelength for over 10 nm with an applied voltage of less than 50 V [13].…”

“…Compared with DFB lasers or VCSELs, FBG lasers offer much better temperature stability (13pm/K) over DFB lasers (>100 pm/K) due to the low thermal-optical coefficient of silica fiber. A passive FBG filter can be tuned over a wide (>90 nm) wavelength range [9]. FBG lasers can also be made with high output power (> 10 mW).…”