118 



Research and National Purpose 



Figure 13. — Bell Telephone Laboratories gas lasers with 

 their inventors, led by Dr. Ali Javan. 



IR 



TRANSMITTING 

 WINDOW 



NOTE THAT THERE 

 IS NO DISCHARGE 

 IN THE INTERACTION 

 PUMP REQioN. 



Figure 14. — Molecular-gas (CO2) laser. 



