DD248265A3 - METHOD FOR CONTROLLING THE FREQUENCY STABILITY OF LASERS - Google Patents
METHOD FOR CONTROLLING THE FREQUENCY STABILITY OF LASERS Download PDFInfo
- Publication number
- DD248265A3 DD248265A3 DD23364881A DD23364881A DD248265A3 DD 248265 A3 DD248265 A3 DD 248265A3 DD 23364881 A DD23364881 A DD 23364881A DD 23364881 A DD23364881 A DD 23364881A DD 248265 A3 DD248265 A3 DD 248265A3
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- German Democratic Republic
- Prior art keywords
- frequency
- laser
- lasers
- mode
- normal
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- Semiconductor Lasers (AREA)
Abstract
Die Erfindung betrifft ein Verfahren zur Kontrolle der Frequenzstabilitaet von Lasern. Sie gestattet eine eindeutige und langfristige Kontrolle der Frequenzstabilitaet von 2-Moden-Innenspiegellasern mit geringem zeitlichem und technischem Aufwand durchzufuehren. Bei dem erfindungsgemaessen Verfahren werden die zueinander senkrecht polarisierten Modenfrequenzen V1, V2 durch einen Polarisationsteiler um 40 dB gefiltert, die Intensitaeten der getrennten Modenfrequenzen fotoelektrisch erfasst und mit einem Drucker angezeigt. FigurThe invention relates to a method for controlling the frequency stability of lasers. It allows a clear and long-term control of the frequency stability of 2-mode internal mirror lasers with little time and technical effort. In the method according to the invention, the mutually vertically polarized mode frequencies V1, V2 are filtered by a polarization splitter by 40 dB, the intensities of the separated mode frequencies are recorded photoelectrically and displayed with a printer. figure
Description
Die Intensität des 2-Moden-lnnenspiegellasers ist durch die GleichungThe intensity of the 2-mode internal mirror laser is given by the equation
|(v)=Ae-B( —)2 + C Δν0 | (v) = Ae B (-) 2 + C Δν 0
darstellbar, wobei v-Frequenz, auf der der Mode schwingtrepresentable, where v-frequency on which the mode vibrates
Δν-ν-νο(νο — Zentrumsfrequenz)Δν-ν- ο (ν ο - center frequency)
Av0 — Doppler, LinienbreiteAv 0 - Doppler, line width
A, B, C — Konstanten bedeutenA, B, C - constants
Durch eine Frequenzverschiebung des frequenzstabilisierten Lasers 1 ändert sich das Verhältnis By a frequency shift of the frequency-stabilized laser 1, the ratio changes
—— ,wobei der Frequenzabstand V2 - V1 konstant bleibt-, Wherein the frequency spacing V 2 - V 1 remains constant
Kv2)Kv 2 )
In der Nähe des abgestimmten Bereiches beider Moden (1[V1] « l[v2]) ergibt sich für einen Verstimmbereich von < 50 MHz eine lineare Beziehung' zwischen der Intensität eines Mode und seiner Frequenzverstimmung. Die Änderung der Gesamtleistung (Intensität), durch eine DeJustierung bzw. Alterung.des Laserrohres hervorgerufen, ist i. a. während des Meßvorganges < 1 % und kann durch Summation der beiden etwa gleich eingestellten Druckerwerte berücksichtigt werden, so daß die Verstärker 4,6 auch in Differenz geschaltet werden können und die Differenzspannung mit einem Schreiber aufgezeichnet werden kann. Auch ist es untefdiesen Bedingungen möglich, eine Registrierung der Intensität nur eines Modes vorzunehmen.In the vicinity of the tuned range of both modes (1 [V 1 ] «l [v 2 ]), for a detuning range of <50 MHz, a linear relationship exists between the intensity of a mode and its frequency detuning. The change in the total power (intensity) caused by a deJustierung.der aging of the laser tube, is generally during the measuring process <1% and can be taken into account by summing the two approximately equal printer values, so that the amplifier 4,6 also in difference can be switched and the differential voltage can be recorded with a recorder. Also, it is sometimes possible to register the intensity of only one mode.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD23364881A DD248265A3 (en) | 1981-09-29 | 1981-09-29 | METHOD FOR CONTROLLING THE FREQUENCY STABILITY OF LASERS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD23364881A DD248265A3 (en) | 1981-09-29 | 1981-09-29 | METHOD FOR CONTROLLING THE FREQUENCY STABILITY OF LASERS |
Publications (1)
Publication Number | Publication Date |
---|---|
DD248265A3 true DD248265A3 (en) | 1987-08-05 |
Family
ID=5533782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DD23364881A DD248265A3 (en) | 1981-09-29 | 1981-09-29 | METHOD FOR CONTROLLING THE FREQUENCY STABILITY OF LASERS |
Country Status (1)
Country | Link |
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DD (1) | DD248265A3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4923291A (en) * | 1987-07-23 | 1990-05-08 | Kokusai Denshin Denwa Kabushiki Kaisha | Optical amplification |
-
1981
- 1981-09-29 DD DD23364881A patent/DD248265A3/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4923291A (en) * | 1987-07-23 | 1990-05-08 | Kokusai Denshin Denwa Kabushiki Kaisha | Optical amplification |
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