Device and method for wavelength conversion and BBO crystal for wavelength conversion

Patent 5552926 Issued on September 3, 1996. Estimated Expiration Date:

June 19, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Issued on: 04/25/1995
Inventor: Ogawa

Inventors

Application

No. 492355 filed on 06/19/1995

US Classes:

359/326, OPTICAL FREQUENCY CONVERTER372/22Frequency multiplying (e.g., harmonic generator)

Examiners

Primary: Lee, John D.

Attorney, Agent or Firm

Berthold; Thomas R.

International Class

G02F 001/35

Foreign Application Priority Data

1994-10-07 JP

Abstract

Laser light radiated from a laser device 12 enters a resonator 16, and an electric field applied to a BBO crystal 14 inside the resonator 16 modulates the resonance frequency of the resonator 16. The BBO crystal 14 has a modulation electrode 32 and a feedback electrode 34, and a photodetector 18 detects laser light modulated by the BBO crystal 14. A signal in proportion to an error in resonance frequency obtained from the photodetector 18 causes an electric field to be applied to the BBO crystal 14 via the electrode 32 to change the resonance length. Negative feedback control is thus provided to the resonance frequency of the resonator 16 which is determined by the electric field applied to the BBO crystal 14 to substantially eliminate error, thereby synchronizing the resonator 16.