Laser-operated detector

• US 5,037,200 A
• Filed: 07/03/1990
• Issued: 08/06/1991
• Est. Priority Date: 07/11/1989
• Status: Expired due to Term

• Current Assignee: Tosoh Corporation
• Original Assignee: Tosoh Corporation
• Inventors: Kodama, Nobuhiro
• Primary Examiner(s): Scott, Jr., Leon
• Application Number:
  US07/547,359
• Time in Patent Office: 399 Days
• Field of Search: 372/20, 372/41, 356/252, 356/338, 356/339
• US Class Current: 356/252
• CPC Class Codes: G01N 2021/1738 Optionally different kinds of measurements; Method being valid for different kinds of measurement
• CPC Class Codes: G01N 2021/653 Coherent methods [CARS]
• CPC Class Codes: G01N 21/63 optically excited
• CPC Class Codes: G01N 21/64 Fluorescence; Phosphorescence
• CPC Class Codes: G01N 30/74 Optical detectors measurement of intensity, velocity, spectral content, polarisation, or phase of infrared, visible or ultraviolet light G01J
• CPC Class Codes: H01S 3/16 Solid materials

Abstract

In a laser-operated detecting device, the light source of a laser beam applied to a specimen under test is a tunable laser whose wavelength can be continuously tuned in a certain range. The detecting device is realized as a high speed liquid chromatography fluorescence detector, a high speed liquid chromatography Raman detector, a laser Raman spectroscopic measuring device, a coherent anti-Stokes Raman measuring device, or a microscopic Raman measuring device.

Claims

1. In a detector device, a tunable laser source emitting a light beam whose wavelength matches a responsive wavelength band of a specimen under test, said tunable laser source comprising:

a titanium-doped sapphire laser having continuously variable wavelength capability.

2. A detecting device as claimed in claim 1, in which the amount of doped titanium in sapphire is in a range of 0.01 atomic % to 0.5 atomic %.

3. A detecting device as claimed in claim 1, in which said tunable solid laser is made up of a titanium-doped sapphire and a non-linear optical material.

4. A detecting device as claimed in claim 3, in which the amount of doped titanium in sapphire is in a range of 0.01 atomic %, to 0.5 atomic %.

5. A detecting device as claimed in claim 3, in which said non-linear optical material is selected from the group comsisting of a β

-barium borate, lithium niobate and methanitroaniline.

6. A detecting device as claimed in claim 1 or 3, in which said detecting device is a high speed liquid chromatography fluorescence detector.

7. A detecting device as claimed in claim 1 or 3, in which said detecting device is a high speed liquid chromatography Raman spectra detector.

8. A detecting device as claimed in claim 1 or 3, in which said detecting device is a laser Raman spectro scopic measuring device.

9. A detecting device as claimed in claim 1 or 3, in which said detecting device is a coherent anti-Stokes Raman measuring device.

10. A detecting device as claimed in claim 1 or 3, in which said detecting device is a microscopic Raman measuring device.