Abstract:
PURPOSE: A microwave generator generating a stable microwave output power using temperature control and a method for stabilizing the microwave output power are provided, which controls the microwave output power accurately and generates a stable microwave output power by controlling its self temperature. CONSTITUTION: A microwave generation part(11) generates a microwave, and a microwave output power detection part(13) detects a microwave output power(P1) from the microwave generation part. A temperature detection part(15) detects a temperature of the microwave generation part, and a temperature display part(14) displays the temperature of the microwave generation part detected by the temperature detection part. A temperature control part(17) generates a control signal to control the temperature of the microwave generation part by receiving an output power detection signal from the microwave output power detection part. A heat generation part(16) cools or heats the microwave generation part according to the temperature control signal from the temperature control part. And a reflection plate(12) transmits a part of the microwave output power(P3) from the microwave generation part so that it is detected by the microwave output power detection part, and reflects another part.
Abstract:
A frequency standard obtaining method within an atomic clock based on CPT(Coherent Population Trapping) by using an injection-locked laser is provided to design a CPT resonance-based frequency standard including CPT signals with improved contrast by removing a carrier and sidebands that are not contributed to CPT. Two coherent lasers are formed by an injection lock structure. In the injection lock structure, an ECDL(External Cavity Diode Laser) operated in a single mode is used as a main laser(L1) and a Fabry-Perot laser diode operated in a single mode is used as a sub laser(L2). The coherent lasers irradiated from the main and sub lasers and operated in a single mode, respectively progress in the same direction while passing through rubidium vapor cells(4,5). Therefore, the CPT spectrum is stabilized within an atomic clock by using the rubidium vapor cell, in order to provide the CPT-based frequency standard.