| 摘要 |
FIELD: radio engineering. ^ SUBSTANCE: quartz piezoelectric cell (QPC) is made double-frequency and placed normally to laser diode (LD) beam. On one surface of QPC three interdigital transducers are applied, and on the opposite surface metalized spot is applied. The first interdigital transducer is located adjacent to contact leaf of QPC holder, the second interdigital transducer is located at the angle of 90 to it, the third interdigital transducer is located counterwise to the second interdigital transducer. The first and the second interdigital transducer are connected respectively to the first and the second amplifiers of frequency dynamic factor temperature control scheme the outputs of which are connected to inputs of phase detector (FD). The signal from FD enters the third amplifier the output of which is connected to the first input of voltage comparator the second input of which is connected to output of digital temperature stabilisation microprocessor (DTSMP). Comparator output is connected to input of current amplifier the output of which is connected to the first input of laser diode electronic modulator (LDEM). The output of LDEM is connected to anode of laser diode (LD) the cathode of which is connected with body. To the input of stabilised frequency signal generator oscillations from the first interdigital transducer come. From its output they are fed to multivibrator oscillator input and the second input of DTSMP. To the first input of DTSMP oscillations come from the output of temperature oscillation mode generator to the inputs of which oscillations from the third interdigital transducer are fed selectively. ^ EFFECT: higher long-term and temperature frequency stability and lower temperature dynamic frequency factor. ^ 3 dwg |
