In-Fiber Mach-Zehnder Interferometer Fabricated by Femtosecond Laser

2013 ◽  
Vol 658 ◽  
pp. 232-236
Author(s):  
Zhi Long Ou ◽  
Yong Qin Yu ◽  
Jia Rong Zheng ◽  
Ji Shun Wang ◽  
Xue Chen ◽  
...  
Keyword(s):  
Refractive Index ◽  
Femtosecond Laser ◽  
Repetition Rate ◽  
Laser Pulses ◽  
Resonance Wavelength ◽  
Femtosecond Laser Pulses ◽  
Experimental Results ◽  
Spatial Period ◽  
Core Mode ◽  
Cladding Mode

We have demonstrated several MZIs based on two spaced 3-dB LPFGs with different interference lengths in conventional SMFs fabricated in air by femtosecond laser pulses with the duration of 200 fs and the repetition rate of 250 kHz. Experimental results show that the average fringe spatial period increases with the resonance wavelength, while decreases with the interference length in approximately inverse proportion. The dominant cladding mode interfering with core mode has been calculated. The MZI sensitivity on temperature, refractive index and strain with a length of 16mm has also been investigated.

Optical breakdown and filamentation of femtosecond laser pulses propagating in air at a kHz repetition rate

2004 ◽  
Vol 13 (3) ◽  
pp. 359-363 ◽  
Author(s):  
Duan Zuo-Liang ◽  
Chen Jian-Ping ◽  
Li Ru-Xin ◽  
Lin Li-Huang ◽  
Xu Zhi-Zhan
Keyword(s):  
Femtosecond Laser ◽  
Repetition Rate ◽  
Optical Breakdown ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

scholarly journals High-Repetition-Rate Femtosecond Laser Processing of Acrylic Intra-Ocular Lenses

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 242 ◽  
Author(s):  
Daniel Sola ◽  
Rafael Cases
Keyword(s):  
Femtosecond Laser ◽  
Repetition Rate ◽  
Laser Processing ◽  
Refractive Index Change ◽  
Laser Pulses ◽  
Processing Parameters ◽  
High Repetition Rate ◽  
Femtosecond Laser Pulses ◽  
Periodic Patterns ◽  
High Repetition

The study of laser processing of acrylic intra-ocular lenses (IOL) by using femtosecond laser pulses delivered at high-repetition rate is presented in this work. An ultra-compact air-cooled femtosecond diode laser (HighQ2-SHG, Spectra-Physics) delivering 250 fs laser pulses at the fixed wavelength of 520 nm with a repetition rate of 63 MHz was used to process the samples. Laser inscription of linear periodic patterns on the surface and inside the acrylic substrates was studied as a function of the processing parameters as well as the optical absorption characteristics of the sample. Scanning Electron Microscopy (SEM) Energy Dispersive X-ray Spectroscopy (EDX), and micro-Raman Spectroscopy were used to evaluate the compositional and microstructural changes induced by the laser radiation in the processed areas. Diffractive characterization was used to assess 1st-order efficiency and the refractive index change.

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