LD-PD's Narrow Linewidth Tunable Laser is external-cavity-based, and compatible to OIF iTLA v1.3 electronics and I/O protocol. Leveraging unique technologies of Litecore epitaxial engineering and super luminescent diode which has been optimized for tunable lasers, the iTLA features of high power in polarization-maintained fiber, and Relative Intensity Noise lower than -145dB/Hz. Litecore iTLA is a best choice for Optical Coherent Communication (eg. for Silicon Photonics) acting as the external laser sources, and is also deployable in LiDAR for its high-power as well as wavelength tunability in a linear mode.
Electrical Characteristics
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Power dissipation | - | - | - | 3.6 | W | At 75°C |
Signal pin input voltage, low | VIL | 0 | - | 0.8 | V | - |
Signal pin input voltage, high | VIH | 2.43 | - | 3.465 | V | - |
Signal pin output voltage, low | VOL | 0 | - | 0.6 | V | 1 |
Signal pin output voltage, high | VOH | 2.4 | - | 3.465 | V | 2 |
3.3 V supply current | - | - | - | 1.5 | A | 3 |
Power-on and power-off sequences | - | 3.3 V power-on time (0–90%) should be less than 50 ms | - | - |
Power supply noise | - | - | - | 1 | % RMS | 4 |
RS232 interface | - | 9600 | - | 115200 | baud | 5 |
Notes:
1. IOL = 8 mA.
2. IOH = –8 mA.
3. Max current ratings cover the operating temperature from –5°C to +75°C . In-rush (peak) current does not exceed maximum supply current levels.
4. For power supplied to the module, 100 Hz to 20 MHz.
5. Default 9600 baud.
Optical Characteristics
Parameter | Min. | Typ. | Max. | Unit | Note |
Optical output power set point | 12 | - | 15.5 | dBm | – |
Accuracy between the power set point and actual output power (BOL) | -0.5 | - | 0.5 | dB | – |
Accuracy between the power set point and actual output power (EOL) | -1.0 | - | 1.0 | dB | – |
Frequency range | 184.35 | - | 196.75 | THz | – |
Wavelength range | 1523.72 | - | 1626.21 | nm | – |
Grid spacing | 0.1 | 50 | - | GHz | – |
Frequency accuracy (BOL) | -1 | - | 1 | GHz | – |
Frequency accuracy (EOL) | -1.5 | - | 1.5 | GHz | – |
Fine-Tune frequency range | -6.25 | - | 6.25 | GHz | – |
Fine-Tune frequency resolution | 100 | - | - | MHz | – |
Spectral linewidth | - | - | 100 | kHz | Lorentzian linewidth |
Side mode suppression ratio | 40 | 50 | - | dB | – |
Relative intensity noise (10 MHz–10GHz, average) | - | - | -140 | dB/Hz | – |
Polarization extinction ratio | 20 | - | - | dB | – |
Back reflection tolerance | - | - | -27 | dB | Stable power and frequency @-20 dB |
Output power when laser is disabled | - | - | -35 | dBm | – |
Wavelength tuning time | – | 10 | 30 | s | – |
Laser turn‑on time | - | 10 | 30 | s | – |
Notes: Case temperature: -5°C to +75°C
Command Interface
Parameter | Min. | Typ. | Max. | Unit |
Command execution time | - | - | 50 | ms |
Command response time after reset | - | - | 800 | ms |
Mechanical Specifications
Figure 1-1 Mechanical dimensions (unit:mm)
Notes:
1. Do not touch the device without static electricity bracelet.
2. Handle the goldbox and pigtail of the tunable laser carefully during assembly.
Fiber Pigtail Specifications
Parameter | Min. | Typ. | Max. | Unit |
Fiber type | Polarization-Maintaining fiber | - |
Mode field diameter | - | 9.5 | - | µm |
Cladding diameter | - | 125 | - | µm |
Coating diameter | - | 250 | - | µm |
Fiber length | 500 | - |
| mm |
Fiber bending radius | 5 | - | - | mm |
Fiber connector | FC/UPC | - |
Polarization axis | Slow axis | - |
Pin Description
The connector type in the Nano ITLA is Board-to-Board male connector with 10 pins for host side.
Figure 2-1 Connector
Pin | Symbol | Type | Description |
1 | +3.3 V supply | Power | +3.3 V power supply Pins are connected together internally. |
2 | NC | Power | No connection |
3 | MS* | Input, active low-high transition | Provides hardware control to reset the physical interface. |
4 | RST* | Input, active low | Disables laser output and holds the module in RESET. |
5 | SRQ* | Output, active low | Programmable module service request |
6 | TXD | Output | Transmits outbound packets from the module. |
7 | DIS* | Input, active low | Provides hardware control to disable laser output. |
8 | RXD | Input | Receives inbound packets from the host. |
9 | GND | Power | Ground Pins are connected together internally. |
10 | NC | Power | No connection |
Absolute Maximum Ratings
It has to be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Operating case temperature | Tc | –5 | - | 80 | °C | - |
Storage case temperature | Ts | –40 | - | 85 | °C | - |
Operating relative humidity | RH | 5 | - | 85 | % | 1 |
Storage relative humidity | RH | 5 | - | 85 | % | 1 |
Power pin voltage 3.3 V supply | VCC | –0.3 | - | 3.6 | V | - |
Signal pin voltage | - | –0.3 | - | 3.6 | V | 2 |
Electro static discharge | - | - | - | 500 | V | 3 |
Fiber bend radius | - | 5 | - | - | mm | - |
Nots:
1. Non-condensing.
2. Signal pins refer to “DIS*, MS*, TXD, RXD, RST*”.
3. Human body model, C = 100 pF, R = 1.5 kΩ.
Operating Environment
Electrical and optical characteristics below are defined under this operating environment, unless otherwise specified.
Parameter | Symbol | Min. | Typ. | Max. | Unit | Note |
Operating case temperature | Tc | –5 | - | 75 | °C | 75°C at long term |
Power pin voltage 3.3 V supply | - | 3.135 | 3.3 | 3.465 | V | - |
Regulatory Compliance
Feature | Category | Standard | Performance |
Safety | NRTL | UL 62368-1 CAN/CSA C22.2 No. 62368-1 IEC 60825-1 IEC 60825-2 | NRTL recognized component for US and CAN |
TUV | EN 62368-1 EN 60825-1 EN 60825-2 | TUV certificate |
FDA | U.S. 21 CFR 1040.10 & 1040.11 | FDA/CDRH certified with accession number according to Laser Notice 56 |
Restriction of Hazardous Substances | RoHS | EU RoHS (2011/65/EU & (EU) 2015/863) & UK RoHS EN IEC 63000:2018 & BS EN IEC 63000:2018 | - |
ESD Design
Normal ESD precautions are required during the handling of this module. This ITLA is shipped in an ESD protective packaging. It should be removed from the packaging and handled in an ESD protected environment utilizing standard grounded benches, floor mats, and wrist straps.
Parameter | Threshold | Note |
ESD | 500V | Human body model |
Safety Specification Design
Do not look into fiber end faces without eye protection using an optical meter (such as magnifier and microscope) within 100 mm, unless you ensure that the laser output is disabled. When operating an optical meter, observe the operation requirements.
CAUTION–Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
