| Zugriffsnummer | 32193 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Digital beat frequency control of an offset-locked laser system |
| Autor(in); Institution |
Köchert, Paul; 5.2, Dimensionelle Nanometrologie, PTB-Braunschweig
Weichert, Christoph; 5.2, Dimensionelle Nanometrologie, PTB-Braunschweig
Flügge, Jens; 5.2, Dimensionelle Nanometrologie, PTB-Braunschweig
Wurmus, Jens; SIOS Meßtechnik GmbH, Ilmenau, GERMANY
Manske, Eberhard; TU Ilmenau, Ilmenau, GERMANY
|
| Quelle/Jahr | 58th IWK, Ilmenau Scientific Colloquium: Proceedings:(2014), 8 S. |
| Availability | [USB-Stick] |
| Herausgeber(in) |
Scharff, Peter
|
| Persistent Identifier | |
| Verlag | Ilmenau: Techn. Universität |
| Konferenzangaben | 58th IWK - Ilmenau Scientific Colloquium, Ilmenau, 08-12, September, 2014, Germany |
| Freie Schlagworte | displacement measurement ; heterodyne interferometry ; beat frequency generation ; offset-locked laser system ; digital control method ; FPGA |
| Zusammenfassung | A digital control system for two coupled laser cavities was developed to generate two lasers beams those frequencies differ by an adjustable beat frequency, which is required for heterodyne interferometer applications. The proposed digital control is supported by a field programmable gate array enabling a high grade of flexibility and requires only a digital input and single analog output channel. Measurement results demonstrated that the beat frequency could be stabilized over an integration time of 1 s with an Allan deviation of 8.6 Hz. In addition, the dynamic behavior of the closed-loop control system was verified by investigating the step response. It was possible to change the beat frequency by a value of 7.5 MHz in about 250 ms. |
