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參數(shù)資料
| 型號： | STL51007G |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 光發(fā)射 |
| 英文描述： | FIBER OPTIC LASER DIODE EMITTER, 1280-1330nm, 1000Mbps, PANEL MOUNT, TO-18, FC CONNECTOR |
| 封裝： | HERMETIC SEALED, SIMILAR TO TO-46, 4 PIN |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 274K |
| 代理商： | STL51007G |
STL51007x
Description
Data Sheet
3
2001-06-01
Description
Differences between a Fabry-Perot and a DFB Laserdiode
A conventional laser consists of an amplifying medium and two end mirrors. The cavity
is longer than one wavelength, and a standing wave is created. The number n of half
wavelengths
λ is
. If L >>
λ then we speak of a Fabry-Perot Laser because the
laserdiode emits multi-longitudinal modes. Typically the laserdiode is 250 m long. For
λ = 1310 nm/1550 nm n is about 350. Therefore for many neighboring wavelengths the
“standing wavelength” condition specified above is fulfilled. For a DFB-Laser a special
grating acts as a distributed filter allowing only one of the cavity’s longitudinal modes to
propagate. This can be described with a reduced oscillator length
which is in the range
of
λ. For such a reduced oscillator length the standing wavelength condition will be
fulfilled for n
≈ 2 what means for only one wavelength.
Figure 2
Fabry-Perot Laserdiode
n2
L
λ
---
×
=
L
1
Wavelength
λ
Intensity
0
012
3
4
5
4
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相關代理商/技術參數(shù) |
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| STL51007N | 制造商:Infineon Technologies AG 功能描述: |
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