高精度,高可靠性原子钟用795nm,850nm,894nm垂直腔面发射激光器(VCSEL激光器)!
关键词:原子钟,atomic clock,VCSEL,795nm VCSEL,850nm,VCSEL,894nm VCSEL 垂直腔面发射激光器,原子钟用垂直腔面激光器,铷原子钟,铯原子钟,磁力仪,频率标准
美国VIXAR公司795nm,850nm,894nm垂直腔面发射激光器(VCSEL)可以实现但横模单纵模输出,适用于铷原子钟,铯原子钟,频率标准,磁力仪等方向。可靠性好,可选各种封装,包括TO-4,TO-5,PLCC-2,裸片等。可以内置TEC,是原子钟等仪器的选择。
Parameter
Symbol
Units
Minimum
Typical
Maximum
Notes
Maximum DC current (CW)
mA
--
--
2
To remain single-mode
Threshold current
Ith
mA
0.6
0.75
0.9
Operating voltage
Vf
Volts
--
2.1
3
Series resistance (VCSEL)
Rs
Ohms
150
175
300
Slope efficiency
SE
mW/mA
--
0.12
--
Optical output power
Lop
mW
0.06
0.1
0.17
In single mode. T=85°C
Optical output power
Lop
mW
0.1
--
0.25
In single mode. T=25°C
Optical output power
Lop
mW
0.04
0.08
0.16
In single mode. T=95°C
Reverse breakdown voltage
V
10
--
--
Ir ≤ 1nA
Operating wavelength
λop
nm
794.5
795
795.5
Side Mode Suppression Ratio
SMSR
dB
20
--
--
Unmodulated.
Spectral line width
Δλ
MHz
--
--
100
Unmodulated.
Polarization extinction ratio
PER
dB
16
--
--
0.25mA < If < 2mA (Note 4)
Beam divergence 1/e2
deg
--
15
--
Whole angle
Beam divergence FWHM
FWHM
deg
--
9
--
Whole angle
Wavelength current coefficient
nm/mA
--
0.42
0.6
Wavelength temp. coefficient
nm/°C
--
0.055
0.061
Rise time
ps
--
--
100
20%-80%
Fall time
ps
--
--
100
20%-80%
Modulation bandwidth (-3 dB)
BW
GHz
4
--
--
ESD Survival
V
1000
--
--
(Notes 3,