PATENT CLAIM ANALYSIS

Application Number: 16015868
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2019-03
Patent Classification: ["372", "020000"]

Abstract:
A method for expanding a tuning range of an all-solid-state continuous-wave single-frequency laser is provided. The method includes inserting a nonlinear frequency-doubling crystal into a laser resonant cavity, and converting a part of intra-cavity fundamental-frequency light to frequency-doubled light by the nonlinear frequency-doubling crystal, outputting the generated frequency-doubled light and the fundamental-frequency light together from the laser resonant cavity, and separating the two via a spectroscope. The method also includes splitting a part of the fundamental-frequency light reflected by the spectroscope through an optical beam-splitter, and outputting the remaining part of the fundamental-frequency light as a main laser. A cavity length of the laser resonant cavity is changed by adjusting a voltage loaded on a piezoelectric ceramic of the all-solid-state continuous-wave single-frequency laser, thereby achieving continuous frequency-tuning of the all-solid-state continuous-wave single-frequency laser.

Claim (Index 1):
A method for expanding a tuning range of an all-solid-state continuous-wave single-frequency laser, comprising:\n (1) inserting a nonlinear frequency-doubling crystal into a laser resonant cavity of the all-solid-state continuous-wave single-frequency laser such that the nonlinear frequency-doubling crystal is located at a waist spot of the laser resonant cavity; (2) after the all-solid-state continuous-wave single-frequency laser operates, converting a part of intra-cavity fundamental-frequency light to frequency-doubled light by the nonlinear frequency-doubling crystal, outputting the frequency-doubled light and the fundamental frequency light together from the laser resonant cavity, and separating the generated frequency-doubled light and the fundamental frequency light via a spectroscope, wherein a reflected light of the spectroscope is fundamental-frequency light, and a transmission light of the spectroscope is frequency-doubled light; (3) splitting a part of the fundamental frequency light reflected by the spectroscope through an optical beam-splitter of the all-solid-state continuous-wave single-frequency laser into a photodetector of the all-solid-state continuous-wave single-frequency laser, outputting a remaining part of the fundamental frequency light as a main laser, converting an incident light signal into an electrical signal by the photodetector and inputting the electrical signal into an input terminal of a servo controller of the all-solid-state continuous-wave single-frequency laser, generating a control signal by the servo controller and inputting the control signal into a signal input terminal of a galvanometer motor bonded with an etalon of the all-solid-state continuous-wave single-frequency laser to control the galvanometer motor to rotate, such that the etalon is rotated under drive of the galvanometer motor, thereby changing an incident angle of the etalon, and locking a transmission peak of the etalon on an oscillating mode of the laser resonant cavity in real time; and (4) changing a cavity length of the laser resonant cavity by adjusting a voltage loaded on a piezoelectric ceramic of the all-solid-state continuous-wave single-frequency laser, so as to achieve continuous frequency-tuning of the all-solid-state continuous-wave single-frequency laser, wherein the achievable maximum tuning range \u0394v is expressed as: \u0394 \ue89e \ue89e v = v FSR + ( \u0394 \ue89e \ue89e v H 2 ) 2 v FSR \u00d7 \u03b7 \u03b7 + L wherein, V FSR  is a free spectral region of the etalon, \u0394v H  is a gain line width of a laser gain medium of the all-solid-state continuous-wave single-frequency laser, \u03b7 is a frequency-doubling conversion efficiency of the nonlinear frequency doubling crystal, and L is a linear loss of the laser resonant cavity.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 94.0
- Lexical Diversity: 2.18462
- Patent Class: 372.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12297051', '10434579', '11396289', '15806953', '11922033']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8296530561870813
- 35 USC 102 Novelty (BERT): 0.5090787597051563
- Combined Prediction Score: 0.7975956265388888
- Mean Citation Score: 279.766704
- Max Citation Score: 298.29935
- Similarity Product: 246.7027790469289

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test