Recent Progresses in He-Ne Lasers Stabilized to 127I2

Practical realization of the definition of the metre, including recommended radiations of other optical frequency standards (2001)

“…Ref. [148,[155][156][157][158][159]. −593.98 0.01 Frequency referenced to a 7 , R(47) 9-2, 127 I 2 : f = 489 880 354.9 MHz [2] Ref.…”

“…−593.98 0.01 Frequency referenced to a 7 , R(47) 9-2, 127 I 2 : f = 489 880 354.9 MHz [2] Ref. [148,155,[157][158][159][160]. Ref.…”

“…14 Frequency referenced to a 9 , P(10) 8-5, 127 I 2 : f = 468 218 332.4 MHz [2] Ref. [148,158,[164][165][166][167][168][169]. 335.99 0.02 Frequency referenced to a 9 , P(10) 8-5, 127 I 2 : f = 468 218 332.4 MHz [2] Ref.…”

Practical realization of the definition of the metre (1997)

“…1982 [12] fa =fi = 1.229 889 316 88 (1 ± 1 2 10 -10 ) BIPM 1982 [27] fa =fi = 1.229 889 316 88 (1 ± 2.5 2 10 -10 ).…”

Temperature Profiles in Etched-Well Surface-Emitting Semiconductor Lasers

“…Figure 2 shows the fractional frequency stability of the source expressed in terms of the square root of the Allan variance, which was 8,7 10 -13 for 10 -3 10 3 s (two FMS-stabilized lasers, both locked to component b 15 ) and 2 10 -13 for 10 -3 10 3 s (laser A phase-locked to laser B). For comparison, the stability of a typical external-cell, third-harmonic-stabilized He-Ne laser is 2 10 -12 [9], for 10 -1 10 2 s. …”