GB1042280A - Improvements in or relating to methods of generating a phase-modulated beam of laserradiation - Google Patents
Improvements in or relating to methods of generating a phase-modulated beam of laserradiationInfo
- Publication number
- GB1042280A GB1042280A GB650264A GB650264A GB1042280A GB 1042280 A GB1042280 A GB 1042280A GB 650264 A GB650264 A GB 650264A GB 650264 A GB650264 A GB 650264A GB 1042280 A GB1042280 A GB 1042280A
- Authority
- GB
- United Kingdom
- Prior art keywords
- laser
- lasers
- modulated
- feb
- magnetic field
- 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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Lasers (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
1,042,280. Lasers. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Feb. 17, 1964 [Feb. 20, 1963], No. 6502/64. Heading H3B. Two gas lasers 21, 24 are arranged so that a radiation path from laser 24 traverses the active medium of laser 21, an output beam 30 of laser light being produced which is phase modulated by applying a varying magnetic field to at least one of the lasers. The two lasers are axially aligned with their respective adjacent reflector plates 23, 25 in intimate contact. Alternatively these plates may be replaced by a single block. The lasers are each biased by D.C. in respective coils 27, 28, and are pumped by current applied to discharge electrodes (not shown). In laser 24 the coil is constructed as a wall of a resonant cavity for microwave energy from a connecting waveguide, the cavity being so proportioned that the direction of high frequency magnetic field coincides with the laser axis. The radiation from laser 24 is frequency modulated by the microwave signal which varies the Zeeman line splitting caused by the bias. Due to anomalous dispersion in the active medium of laser 21, the frequency-modulated output of laser 24 causes fluctuation of the transmission time through laser 21 and consequently phase modulation of the output beam 30.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL289253 | 1963-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1042280A true GB1042280A (en) | 1966-09-14 |
Family
ID=19754436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB650264A Expired GB1042280A (en) | 1963-02-20 | 1964-02-17 | Improvements in or relating to methods of generating a phase-modulated beam of laserradiation |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE644047A (en) |
| CH (1) | CH439515A (en) |
| DE (1) | DE1270704B (en) |
| DK (1) | DK111300B (en) |
| GB (1) | GB1042280A (en) |
| NL (1) | NL289253A (en) |
-
0
- NL NL289253D patent/NL289253A/xx unknown
-
1964
- 1964-02-15 DE DE19641270704 patent/DE1270704B/en active Pending
- 1964-02-17 GB GB650264A patent/GB1042280A/en not_active Expired
- 1964-02-17 CH CH183164A patent/CH439515A/en unknown
- 1964-02-17 DK DK76264A patent/DK111300B/en unknown
- 1964-02-19 BE BE644047A patent/BE644047A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1270704B (en) | 1968-06-20 |
| BE644047A (en) | 1964-08-19 |
| NL289253A (en) | |
| DK111300B (en) | 1968-07-22 |
| CH439515A (en) | 1967-07-15 |
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