Abstract
We performed the experiment of self-induced transparency in samarium atomic vapor under the condition of high temperature and high density. The sudden onset of the transmission, the maximum pulse delay and the pulse broadening were observed with π pulse. With this result we estimate the dipole moment of the transition line for 152Sm. The peak amplification, the pulse narrowing and the pulse breakup were observed when the pulse area was above 3π. These observations are strong evidences of self-induced transparency. Our result is the observation of self-induced transparency under the highest-temperature, highest-density condition and the first observation of this phenomenon in samarium vapor to our knowledge.