Maser frequency control systems using refractive index change

• US 3,243,722 A
• Filed: 08/28/1961
• Issued: 03/29/1966
• Est. Priority Date: 08/28/1961
• Status: Expired due to Term

• Current Assignee: Bruce H. Billings
• Original Assignee: Bruce H. Billings
• Inventors: Billings, Bruce H.
• Application Number:
  US04/135,104
• Time in Patent Office: 1,674 Days
• US Class Current: 372/32
• CPC Class Codes: H01S 3/105 by controlling the mutual position or the reflecting properties of the reflectors of the cavity , e.g. by controlling the cavity lengthH01S3/10076, H01S3/13 take precedence
• CPC Class Codes: H01S 3/139 by controlling the mutual position or the reflecting properties of the reflectors of the cavity , e.g. by controlling the cavity length

Claims

1. A SYSTEM COMPRISING A MASER UNIT HAVING A NEGATIVE TEMPERATURE MEDIUM AND A TUNING MEDIUM IN SERIES, PUMPING MEANS FOR SAID NEGATIVE TEMPERATURE MEDIUM, FIRST FABRY-PEROT MEANS PRESENTING REFLECTIVE SURFACES AT THE OPPOSITE EXTREMITIES OF SAID SERIES, AT LEAST ONE OF SAID REFLECTIVE SURFACES BEING PARTIALLY TRANSPARENT, CONTROL MEANS FOR VARYING THE INDEX OF REFRACTION OF SAID TUNING MEDIUM, AND TRANSDUCER MEANS INCLUDING SECOND FABRY-PEROT MEANS RESPONSIVE TO A PROPORTION OF RADIATION EMITTED FROM SAID NEGATIVE TEMPERATURE MEANS TO OPERATE SAID CONTROL MEANS, SAID TRANSDUCER MEANS INCLUDING MEANS FOR DIRECTING RADIATION FROM SAID FIRST FABRY-PEROT MEANS TO SAID SECOND FABRY-PEROT MEANS, MEANS FOR PRODUCING A SIGNAL IN RESPONSE TO SAID RADIATION RECEIVED BY SAID SECOND FABRY-PEROT MEANS AND MEANS FOR APPLYING SAID SIGNAL TO SAID CONTROL MEANS.