optical circulator
An optical circulator and optical fiber technology, applied in the optical field, can solve the problems of limited application value and difficult preparation, and achieve the effect of simple preparation and easy integration
Active Publication Date: 2019-04-02
NANJING UNIV
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Problems solved by technology
[0005] The defects of the existing optical circulators are: they cannot be well integrated on the micro-nano scale, and polarizers need to be integrated on both the front and back sides of the optical isolator, which is difficult to prepare and its application value is greatly limited.
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[0046] 1. Draw a single-mode optical fiber with a diameter of 1-5 μm by high-temperature stretching method, and fix the optical fiber horizontally on the translation stage;
[0047] 2. Build an optical path so that the probe light and the pump light pass through a wavelength division multiplexer (Wavelength Division Multiplexing, WDM) to synthesize a bundle and enter the second port of the first optical fiber 1, and then come out from the third port of the first optical fiber 1 to connect to the WDM Probe light and pump light are separately connected to detector and oscilloscope to monitor the change of transmission spectrum;
[0048] 3. By doping Er 3+ Ionic silica sol-gel thin film made active optical microcavity with high quality factor and high gain, the pump light wavelength is 1469.3nm, and the pump mode quality factor is 1.7×10 6, there is gain around 1550nm, the signal light wavelength is 1550.3nm, and the signal mode quality factor is 7.7×10 5 ;
[0049] 4. Place t...
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The embodiment of the invention provides an optical circulator. The optical circulator comprises a first optical fiber, a second optical fiber and an active optical microcavity, wherein the first optical fiber and the second optical fiber are positioned on the two sides of the active optical microcavity respectively and both coupled with the active optical microcavity; when probe light of which the wavelength is the working wavelength of the optical circulator is input from the first port of the second optical fiber, the probe light is output from the second port adjacent to the first port on the first optical fiber; and when input from the second port of the first optical fiber, the probe light is output from the third port of the first optical fiber. The scheme is realized based on single active optical microcavity and two optical fibers, and the light is limited in a very small area by use of the effects such as reflection, total reflection, scattering and diffraction of the active optical microcavity on an interface with discontinuous refractive index; optical circulation is realized through the coupling between the evanescent wave of the light field and the two optical fibers; and the optical circulator is easy to produce and integrate.
Description
technical field [0001] Embodiments of the present invention relate to the field of optical technologies, and in particular, to an optical circulator. Background technique [0002] An optical circulator is a multi-port non-reciprocal optical device that passes light through all intermediate ports in sequence. For example, when light is input from port 1, it is output from port 2, and when light is input from port 2, it is output from port 3. The optical circulator plays an important role in two-way communication. It can complete the separation of forward and reverse optical signals, and plays an important role in optical communication, optical information processing, optical fiber sensing and precision optical measurement. [0003] With the rapid development of photonic chips, photonics is developing towards integration, and the demand for micro-optical components that can realize functions such as on-chip optical communication, optical storage, optical switching, and optica...
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IPC IPC(8): G02B6/293G02B6/26
CPCG02B6/26G02B6/2932
Inventor 姜校顺吴红亚杨超肖敏
Owner NANJING UNIV