Table 2.1 Q-factors
and dimensions of various optical resonators applied in lasers and laser systems
Time constant, not
more than
Volume in
cubic (μm)
3
Fabry–
Perot
Fiber Bragg grating
FBG
Disk optical
resonator
Photon
crystals
MediumQ
1 ps
10,000
Q
¼ 2000
Mirrors
Q
¼ 1.2
 10
6
FBG
Q
¼ 7000
Q
¼ 130,000
Q
¼ 520,000
(Painter)
Q
¼ 6
 10
5
(Noda)
High-Q
1 ns
1000
Q
¼ 10
7
Supermirrors
(Kembl)
Q
¼ 1.2
 10
6
FBG (step 100 nm, Cell length 34 mm, length of delay
2 m, 16 MHz, SiO
2 , TeraXion)
Q
¼ 2
 10
9
disk (Vahala)
Q
¼ 8
 10
9
SiO
2
UltrahighQ
1
μs
100
Q
¼ 8
 10
15
CaF
2
(Il’chenko)
Note: Q
is the Q-factor
of the optical resonator (a product of the optical frequency and the time constant)
40
2 Nanostructural Optoelectronic Oscillators with the Fiber-Optical Delay Line
and dimensions of various optical resonators applied in lasers and laser systems
Time constant, not
more than
Volume in
cubic (μm)
3
Fabry–
Perot
Fiber Bragg grating
FBG
Disk optical
resonator
Photon
crystals
MediumQ
1 ps
10,000
Q
¼ 2000
Mirrors
Q
¼ 1.2
 10
6
FBG
Q
¼ 7000
Q
¼ 130,000
Q
¼ 520,000
(Painter)
Q
¼ 6
 10
5
(Noda)
High-Q
1 ns
1000
Q
¼ 10
7
Supermirrors
(Kembl)
Q
¼ 1.2
 10
6
FBG (step 100 nm, Cell length 34 mm, length of delay
2 m, 16 MHz, SiO
2 , TeraXion)
Q
¼ 2
 10
9
disk (Vahala)
Q
¼ 8
 10
9
SiO
2
UltrahighQ
1
μs
100
Q
¼ 8
 10
15
CaF
2
(Il’chenko)
Note: Q
is the Q-factor
of the optical resonator (a product of the optical frequency and the time constant)
40
2 Nanostructural Optoelectronic Oscillators with the Fiber-Optical Delay Line