GB1371381A - Electromagnetic wave propagating means - Google Patents
Electromagnetic wave propagating meansInfo
- Publication number
- GB1371381A GB1371381A GB201971A GB201971A GB1371381A GB 1371381 A GB1371381 A GB 1371381A GB 201971 A GB201971 A GB 201971A GB 201971 A GB201971 A GB 201971A GB 1371381 A GB1371381 A GB 1371381A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mirror
- laser
- ring
- jan
- chosen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/083—Ring lasers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Gyroscopes (AREA)
Abstract
1371381 Lasers EMI Ltd 11 Jan 1972 [15 Jan 1971] 2019/71 Heading H1C In a ring laser, mode locking between the two counterrotating beams due to back scattering of the beams from imperfections in a planar corner mirror is cancelled by vibrating the mirror in the plane of its reflecting surface. The ring laser is thus able to measure low rotation rates when used as a compass. In the embodiment of the figure a mirror 1 at a corner of the ring is vibrated in its plane, as shown by arrow 6. The vibration is chosen to reduce a spectral component of the back-scattered wave corresponding to the laser circulating frequency. The vibration may also be chosen so that the first order sideband components of the scattered wave lie outside the operating band of frequencies of the laser system. The vibrations may be produced by a piezoelectric device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB201971A GB1371381A (en) | 1972-01-11 | 1972-01-11 | Electromagnetic wave propagating means |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB201971A GB1371381A (en) | 1972-01-11 | 1972-01-11 | Electromagnetic wave propagating means |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1371381A true GB1371381A (en) | 1974-10-23 |
Family
ID=9732165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB201971A Expired GB1371381A (en) | 1972-01-11 | 1972-01-11 | Electromagnetic wave propagating means |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1371381A (en) |
-
1972
- 1972-01-11 GB GB201971A patent/GB1371381A/en not_active Expired
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |