Temperature sensor and fiber laser based on optical microfiber knot resonator

• Main Authors: Ahmad, Harith, Zulkhairi, Aiman Syahirah, Azzuhri, Saaidal Razalli
• Format: Article
• Published: Elsevier 2018
• Subjects: QC Physics; TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/22657/; https://doi.org/10.1016/j.ijleo.2017.10.032
• Institution: Universiti Malaya

An easy method to fabricate microfiber-knot resonator (MKR) is designed and its application as a temperature sensor and multi-wavelength fiber laser (MWFL) is demonstrated. The MKR has a temperature sensitivity of 14.5 pm/°C over a temperature range of 27–95 °C, and experimental results show good linearity between the temperature and resonant wavelength shifts. As an MWFL on the other hand, up to four lasing lines with a channel spacing of 4.29 nm are obtained. These results confirm that the MKR could be employed as a high performance comb filter to realize compact optical sensor and MWFL designs.