Continuously tunable fiber laser based on Fano resonance filter of thin-fiber-taper-coupled conical microresonator

Induced Transparency with Optical Cavities

“…With the assistance from Fano resonance, a conical microresonator fabricated by etching method (Figure 5f ) enables the stable and tunable lasing emission at reduced complexity. [75] Except for different experimental configurations and demonstrations, a considerable number of conceptual works have been developed around the EIT effect in optical cavities, contributing to exploration of new phenomena and applications, such as slow light, [76,77] optical nonlinearity, etc. In 2004, Suh et al introduced a general temporal coupled-mode theory for describing the Fano interference in multimode cavities, and the nonorthogonal modes related spectral lineshape is provided in this theory.…”

“…(f ) Reproduced with permission. [75] Copyright 2020, Elsevier. single or paired enhanced transparency and Fano resonance are made possible, as well as simultaneous generation of both fast and slow light.…”

“…With the assistance from Fano resonance, a conical microresonator fabricated by etching method (Figure 5f) enables the stable and tunable lasing emission at reduced complexity. [ 75 ]…”

“…[ 74 ] f) Fabrication process of a conical microresonator presenting lasing action based on Fano resonance. [ 75 ] (a) Reproduced with permission. [ 63 ] Copyright 2015, OSA.…”

In-Fiber Polymer Microdisk Resonator and Its Sensing Applications of Temperature and Humidity

“…Because of their extremely narrow mode linewidths, extremely high photon state densities, extremely strong mode light energies, and high-quality factors, whispering-gallery mode (WGM) microcavities are widely employed in low-threshold lasers, high-sensitivity sensors, optical filters, nonlinear optics, and other applications. − In recent decades, WGM microcavities based on polymeric, semiconductor, and crystalline materials have been studied widely. − For sensing applications, the sensitivity of WGM resonators depends on several factors, such as the structure, size, material, noise, and experimental setup. , Among these, polymer-based WGMs, in particular, have been pursued and enable to provide higher sensitivity because of their beneficial physical and chemical properties, such as high elasticity and thermo-optical coefficient, simple surface modification/postmodification, and good plasticity and biocompatibility. − However, the complex excitation and detection devices required for WGM resonators lack flexibility for use in practical applications. Therefore, a more flexible and robust way to realize high-efficiency excitation and detection of WGM signals is being sought.…”