Hologram Lasers GH5R41HA3CHologram Lasers
Parameter Symbol MAX. UnitConditions MIN. TYP.
■Optical Characteristics of Hologram Device (Design Standard*) (TC=25˚C)
Parameter Symbol MAX. Unit
--˚
12.4
Conditions MIN. TYP.
- 26.4
Grating diffraction efficiency 6.7 9 --0:1
Grating diffraction angle - λ=780nm -2.8- ˚
Hologram diffraction
efficiency -λ=780nm 77 82 - %
- 679%
Hologram diffraction
angle -λ=780nm - 21.1 - ˚
0 th
D1, D2
±1st
Except D1, D2
■Electro-optical Characteristics of Laser Diode (Design Standard*) (TC=25˚C)
Misalignment position ∆x−-80 - +80 µm
∆y-80 - +80 µm
∆z-80 - +80 µm
❇3Reflectivity of LD rear facet Rr−85 - - %
114
■
Electro-optical Characteristics of OPIC for Signal Detection (Design Standard*)
(TC=25˚C, VCC=5V, Vref=2.1V)
❇3Sampling rate is 1pc./reflection membrane formation process lot
❇4Appricable divisions correspond to output terminals.
A : VA, VB, VC, VD
B : VE+G, VF+H
❇5Difference from Vref
❇6Light source is a laser diode of λ=780nm.
❇7-3dB level (0dB level is taken for output level when f=0.1MHz)
❇810µW of DC light is applied to the center of each photodiode, and 4µW
of AC light is irradiated. BW=10kHz
❇95kΩof resistor and 10pF of capacitor should be connected in parallel
between output terminal and Vref terminal.
Parameter Symbol Unit
❇4
Segment
Conditions MIN. TYP. MAX.
Supply voltage VCC −4.75 5 5.25 V
Reference voltage Vref −2.00 2.1 2.21 V
Reference voltage terminal current
Iref Common to high/low gain, No light -0.5 1 2 mA
❇6,7,8,9
Response frequency fcm
Main amp, Common to high/low gain, -3dB
45 60 - MHz A
fcs
Sub amp, Common to high/low gain, -3dB
1 2 - MHz B
❇5,6,8,9
Peaking level Vpk2Common to high/low gain
f=0.1 to 50MHz --3dBA
❇9Noise level fnm Hign gain, 50 Ωend
BW=30kHz, f=36MHz - -74 -68 dBm A
Sensitivity 1 Rm1 Main amp, Hign gain 18 24 30 mV/µWA
Sensitivity 2 Rm2 Main amp, Low gain 0.72 0.96 1.2 mV/µWA
Sensitivity 3 Rm3Sub amp, Hign gain 72 96 120 mV/µWB
Sensitivity 4 Rm4Sub amp, Low gain 2.88 3.84 4.8 mV/µWB
Thermal drift of sensitivity Rsm/T Common to high/low gain - 4 200 - ppm/˚CA, B
Thermal drift of offset voltage
Vod/T Common to high/low gain, No light - 300 - µV/˚CA, B
Thermal drift of offset voltage 1
Vos1/T Main amp, Hign gain, No light - 30 - µV/˚CA
Thermal drift of offset voltage 2
Vos2/T Main amp, Low gain, No light - 15 - µV/˚CA
Thermal drift of offset voltage 3
Vos3/T Sub amp, Hign gain, No light - 30 - µV/˚CB
Thermal drift of offset voltage 4
Vos4/T Sub amp, Low gain, No light - 15 - µV/˚CB
Thermal drift of offset voltage 5
Vos5/T
Between main-sub amp, Hign gain, No light
- 100 - µV/˚CA-B
Thermal drift of offset voltage 6
Vos6/T
Between main-sub amp, Low gain, No light
-45-
µV/˚CA-B
Over/undershoot at gain
switching tstr1
Common to high/low gain, Integral value of the first
overshoot/undershoot peak value and overshoot/undershoot time
- 200 - µs✕mV A, B
Stabilization time at gain switching
tstr2
Common to high/low gain, time for ±3mV
--25
µsA, B
Settling time test
Output voltage 500mV →5mV
Low gain, fall time -30-nsA
Maximum output voltage Vomax
Common to high/low gain, V
ref
reference
1--VA, B
Output terminal current Io Common to high/low gain -0.03 0.01 0.3 mA A, B
f=6.9MHz
* These parameters are not guaranteed performance, but general specifications of each optical element which makes up a hologram laser.
• Please refer to the chapter "Handling Precautions"
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