Photonics
Optical Communications
Planar Lightwave Circuit Lineup
AWG Multi/Demultiplexer
AWG Multi/Demultiplexer
Wavelength Mux / DEMUX for DWDM based on planar lightwave circuit including arrayed waveguide grating(AWG).Many have already been used in practical systems all over the world. An attractive solution for DWDM.
Athermal AWG Multi/Demultiplexer
NEL is the pioneer and market leader of athermal AWG. NEL's athermal AWG is an ultra-compact MUX/DEMUX device without the need for temperature controller. The AWG is based on our patented technology, and offers a highly stable and reliable device.
Thermally controlled AWG
NEL is the pioneer and market leader of AWG. NEL's AWG combines and splits optical signals of different wavelengths for use in WDM systems. The heart of the device, the AWG, consists of a number of arrayed channel waveguides that act together like a diffraction grating in a spectrometer.
Colorless AWG
NEL's colorless AWG can cover multiple band with one part number, based on the cyclic nature of AWG. The colorless AWG enables our customers to trim the inventories.
ROADM related
VOA Multiplexer / Demultiplexer [VMUX / VDMUX]
VMUX and VDMUX consists of PLC based valuable optical attenuator (VOA) and arrayed waveguide grating (AWG). The VMUX is applicable to point-to-point DWDM network, the add/drop port of wavelength blocker type ROADM node and fixed OADM node.
Reconfigurable Optical Add Drop Multiplexer [ROADM]

ROADM consists of DEMUX-Switch-MUX (DSM) reconfigurable Add multiplexer (ROAM) for he Add ports, and the DMUX for the Drop ports. It also offers the broadcast and select functionality by the splitter. The ROADM is applicable to metro core and metro access networks, and enterprise networks.
Optical Channel Monitor [OCM]
OCM converts optical power level of each DWDM channel to photo current, respectivery. OCM consists of PLC based DMUX and photo diode array. OCM is applicable to wavelength selective switch (WSS) node and optical cross connect.
Thermo-optic Switches/Attenuators
Arrayed Variable Optical Attenuator
An arrayed variable optical attenuator based on silica-based planar lightwave circuit is a stable and reliable solution for adjusting optical signal Intensity.
1xN Optical Switch
PLC* based 1xN optical switch provides a compact, stable and highly reliable solution for optical switching. Its highly reliable and high speed nature is applicable to the multiple point power monitoring by sharing single optical channel monitor.
*PLC: Planar Lightwave Circuit
NxN Non-blocking Optical Matrix Switch
PLC* based NxN optical matrix switch provides a compact, stable and reliable solution for optical cross connect. The NxN matrix switch has a non-blocking configulation.
*PLC: Planar Lightwave Circuit
PLC Mach-Zehnder Interferometer
PLC Mach-Zehnder Interferometer
Stable and reliable Mach-Zehnder interferometer based on silica-based planar lightwave circuite. It is suitable solution for the high-speed DPSK / DQPSK transmission systems.
Splitters/Couplers
OPTICAL PLC SPLITTER
- * 1xN (N=4, 8, 16, 32, 64)
- * 2xN (N=8, 16, 32)
- * 8x(4x4), 16x(1x2)
Optical Receiver
Integrated Rxl FE Module
Integrated 100G DP-QPSK Rx FEs
NLTH100GRXIFEDC is a receiver frontend module for 100G DP-QPSK systems. Dual polarization optical hybrid and four balanced photoreceivers are integrated in a surface-mount type package.
Optical Semiconductor Lineup
Semiconductor Laser Diodes(LD)
10 Gbps EML-TOSA
- * Dispersion penalty: < 2 dB (Dispersion tolerance up to 1600 ps/nm)
- * LC/SC Receptacle and pigtail interfaces are available
- * DWDM product lineup
Tunable Laser Array
- * Long-term wavelength stability without mode-hopping
- * Reliable operation without moving parts
- * Automatic power control via the SOA
- * C-band & L-band
Others Lineup
Free Bending Optical Cord
Free Bending Optical Cord
-Everybody can handle like electrical cord!-
- * 2.5 mm minimum bending radius.
- * Keep same optical characteristics as conventional fiber.
- * User can handle this cord without special knowledge about optical fiber.
- * Telecom Carrier / System bender can save both labor cost and deploy / maintenance cost after deployment.
- * This smallest bend radius can make realize to minimize the size of optical transmission equipments.
- * Free Bending Optical Cord is based on the newest fiber technology called as hole assisted fiber, holey fiber, micro-structured fiber and so on.
Optical Fiber Amplifiers
Optical Fiber Amplifiers
NEL has supplied a broad range of optical fiber amplifiers.Our lineup includes single-band fiber amplifier (C and L-band Erbium-doped fiber amplifier) and multi-band fiber amplifier (C+L band Erbium-doped fiber amplifier).
Optical Application
Optical Semiconductor Lineup
Wavelength Conversion Lasers
Visible Laser / Near IR and mid-IR Laser λ
- * Excellent stability (1% for 15)
- * Low noise ( < 1% rms )
- * Good beam quality ( near Gaussian )
- * Long life time ( >10,000h estimated )
DFB Lasers for Gas Sensing
14p Butterfly Type
5.6 TO-Can Type
Near infrared molecular absorption and available wavelengths range between 1260 nm and 2350nm
- * 14p Butterfly (HF/H2O/NH3/CO/H2S/CH4)
- * 5.6 TO-Can (HF/H2O/NH3/CO/CH4/CO2)




![VOA Multiplexer / Demultiplexer [VMUX / VDMUX]](img/s_voa_mul_d.jpg)
![Reconfigurable Optical Add Drop Multiplexer [ROADM]](img/s_recon_roadm.jpg)
![Optical Channel Monitor [OCM]](img/s_opt_c_m_ocm.jpg)











