A phase-modulation-based broadband fiber-optic spectrometer
By employing phase modulation technology in fiber optic spectrometers to increase the number of independent spatial channels for speckle patterns, the problem of the mutual constraint between spectral resolution and bandwidth is solved, enabling high-resolution and wide-bandwidth spectral measurements.
CN115541019BActive Publication Date: 2026-05-29HARBIN ENG UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HARBIN ENG UNIV
- Filing Date
- 2022-10-17
- Publication Date
- 2026-05-29
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Figure CN115541019B_ABST
Abstract
The application discloses a kind of broadband fiber spectrometer based on phase modulation, including polarization maintaining optical fiber, fiber collimator A, phase modulation device, fiber collimator B, multimode optical fiber, CCD image sensor and computer that are sequentially arranged, fiber collimator A is set to the light outlet of polarization maintaining optical fiber, phase modulation device carries out phase modulation to the incident light from fiber collimator A, fiber collimator B is set to the light inlet of multimode optical fiber, the light outlet of multimode optical fiber is aligned with CCD image sensor, and CCD image sensor is electrically connected with computer.The application uses the above structure to overcome the problem that spectrum resolution and measurement bandwidth are mutually restricted in fiber spectrometer.
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