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Optical frequency measurement device

A frequency measurement and optical technology, applied in the field of frequency or wavelength devices, can solve problems such as reducing the efficiency of optical frequency measurement devices

Pending Publication Date: 2021-08-24
朗美通经营有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, the use of reference beams reduces the efficiency of optical frequency measurement devices, so there is a need for solutions that do not require reference beams

Method used

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  • Optical frequency measurement device
  • Optical frequency measurement device
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Embodiment Construction

[0030] The following detailed description of example embodiments refers to the accompanying drawings. The same reference numbers in different drawings may identify the same or similar elements.

[0031] Some embodiments described herein provide an optical frequency measurement device that enables gridless operation over a wide frequency band and is self-normalizing (eg, the optical frequency measurement device does not require the use of a reference beam). For example, an optical frequency measurement device may use an etalon having three or more regions, each with a different path length. In some embodiments, the etalon and its multiple regions are formed from a single element (eg, a monolithic element). The frequency response of each region is such that the frequency response has a similar free spectral range (FSR), but is dispersed in phase, as described in more detail below. The input beam is split into three beams, each directed into one of these regions, and the intens...

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Abstract

An optical locker may include an assembly. The assembly may include a beam splitter, configured to split an input beam into at least three beams; an etalon having at least three regions, positioned so that each beam passes through a different region; a detector configured to measure output intensities, Tn, of the etalon for the beam; and a controller configured to determine a ratio, Ta / Tb, of the output intensities, wherein that ratio has a slope at the output intensities which is above a threshold, obtain a target frequency of the input beam, and determine an actual frequency of the input beam based on the target frequency and the ratio of the output intensities.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This patent application claims priority to US Provisional Patent Application No. 62 / 980,761, filed February 24, 2020, entitled "etalon-based wavelength locker." The disclosures of the earlier applications are considered to be part of this patent application and are hereby incorporated by reference. technical field [0003] The present invention generally relates to an apparatus for measuring the frequency or wavelength of a light beam, and to an optical locker for a laser and an assembly for use therein. Background technique [0004] In fiber optic communication channels, dense wavelength division multiplexing (DWDM) is used to transmit multiple optical signals over a single fiber. For such applications, each of the channels has a different frequency, [0005] The frequency of the optical signal generated by the laser source is locked to the target frequency by an optical locking mechanism. The optical locking mechan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J9/00
CPCG01J9/00
Inventor 科林·史密斯阿德里安·佩林·詹森斯图尔特·康利
Owner 朗美通经营有限责任公司